Powerhouse

Object number: 97/92/14-5  What does it cost to be visible? Chinese and trans people shift in and out of focus in Australia’s historical records – appearing and disappearing, code-switching, oscillating. Through the lens of turn-of-the-century portrait photography, Jinghua Qian looks at the privilege and burden of representation and the luminous power of inscrutability.  The piece was recorded and produced in Melbourne on the land of the Wurundjeri and Bunurong People of the Kulin Nations, with additional recordings from Gadigal land, Lenape homelands (New York City) and Tio'tia:ke (Montreal).    Jinghua Qian is a writer interested in race, resistance, art, desire, queerness and the Chinese diaspora. Eir work has appeared in Overland, Peril, The Guardian, The Saturday Paper and on television in ABC’s China Tonight. Ey lives in Melbourne’s west on the land of the Kulin Nations.    Thanks to Jon Tjhia, Atong Atem, Oliver Reeson, Kate Bagnall, Tim Sherratt, the Powerhouse team, and my perilous, unparalleled chorus: Alice Tang, Eric Jiang, Jackie Tang, Jessica Jiamei Levine, Jon Tjhia, Joyce Cheng, Lee Lai, Lian Low, Lilian Shen, Margaret Mayhew, Raina Peterson and Vicky Yuan.  Oscillations is presented by Jon Tjhia and sound design is by Erin Hyde (Sig Nu Gris).  Interested in learning more? Check out the Oscillations collection set.   

Object number: 2007/56/104 In Mutual Obligation Sally Olds looks into unemployment activism in 1970s Australia, when Malcolm Fraser was Prime Minister and Milton Friedman toured the continent. The piece tracks the links between unemployed worker unions, the origin of the ‘dole bludger’, and the rise of the unemployment policies we live under and struggle against today.  Sally Olds is a writer whose work has been published by Sydney Review of Books, un Magazine, the Institute of Modern Art, and AQNB, among other publications. In September 2022 she released her first book, People who Lunch: Essays on Work, Leisure, and Loose Living (Upswell). Keep up with Sally via her website, Twitter and Instagram.  This work was made on the unceded land of the Wurundjeri and Bunurong Peoples of the Kulin Nation. Sally pays her respects to their Elders past and present.  With thanks to Jon Tjhia for his support with editing, recording, and producing this work, Ayeesha Ash and Cara Stewart for their curatorial support, Alex Griffin for information about Australia’s economic history, and Owen Bennett for his interview. Thank you to all who shared stories about their experiences of Centrelink.  Oscillations is presented by Jon Tjhia and sound design is by Erin Hyde (Sig Nu Gris).  Interested in learning more? Check out the Oscillations collection set. 

Object number: 87/1192  Omar Musa responds to the Radiesthesia pendulum in a piece about divination and love. ‘I was drawn to this object because it seemed evocative of the type of spirit that poets (and yearning lovers) often invoke, a summoning or divination process, where the lines between art and pseudoscience blur.’  Omar Musa is a Bornean-Australian author, visual artist and poet from Queanbeyan, Australia. He has released four poetry books (including Killernova) and four hip-hop records. His one-man play, Since Ali Died, won Best Cabaret Show at the Sydney Theatre Awards in 2018. His debut novel, Here Come the Dogs, was long listed for the Miles Franklin Award and he was named one of the Sydney Morning Herald’s Young Novelists of the Year in 2015. You can learn more about Omar and his work by heading to his Instagram @omarbinmusa or his website.  Omar would like to thank Cara Stewart and Jon Tjhia for the attentive feedback and care.  Oscillations is presented by Jon Tjhia and sound design is by Erin Hyde (Sig Nu Gris).  Interested in learning more? Check out the Oscillations collection set. 

Object number: 2004/42-1  A Radiating Body turns to the not-so-distant past, when the body still held mystery and medicine still had a touch of magic about it. This replica of a multi-wave oscillator machine, built by Angas Vivian Jones in 1970s Sydney, is at once a homemade therapeutic device, and a container for desire, faith and an irrepressible spirit of invention.  Miyuki Jokiranta presents and produces ABC Radio National’s documentary program, Earshot. Her work has aired on the BBC, NPR and the European Broadcasting Union. Miyuki fell in love with radio arts while curating Soundproof and has created expanded documentaries for MONA FOMA, Radio Revolten and BLEED festivals.   With thanks to Neil Wilson, laboratory manager at St Vincent's Hospital Melbourne and amateur radio enthusiast, Eloise Oxer, Bruno Sacco and Tony Kerselaers at Multi Wwave Research for the use of their recordings.  Oscillations is presented by Jon Tjhia and sound design is by Erin Hyde (Sig Nu Gris).  Interested in learning more about the multi-wave oscillator? Check out Multi Wave Research, Melbourne Electronics and Radio Club or the Oscillations collection set.

The PB/5 pedestrian crossing button is a celebrated icon of Australian design. Its renowned sound became part of an independent movement for social change, and the audio tactile pedestrian button became an irreplaceable feature in our neighbourhoods. In Push to Walk: A People’s History of the Pedestrian Button find out how the PB/5 pedestrian button came to be a fixture on Australian streets from the people who helped make it happen: engineers, Vision Australia advocates and the blind and vision impaired communities.   Producer Jane Curtis is an award-winning producer of podcasts and radio documentaries. Her podcast Inner West Icons is a sound-rich, playful tour of Sydney’s inner west.  Sound engineer John Jacobs is an international award-winning ABC sound engineer. He brings sounds and voices together to tell engaging stories with warmth, humour and surprise.  Narration by Bernie Hobbs. With thanks to advocates: Bill Jolley, Deputy Chair of Vision Australia; Susan Thompson, Advocacy Advisor with Vision Australia; Graham Innes, lawyer and former Australian Disability Discrimination Commissioner. With thanks to engineers: Frank Hulscher, traffic engineer at the NSW Road Transport Authority; Graeme Patterson, traffic engineer at the NSW Road Transport Authority; Louis Challis AM, acoustical engineer at Nielsen Design.   Oscillations is presented by Jon Tjhia and sound design is by Erin Hyde (Sig Nu Gris).  Interested in learning more? Check out the Oscillations collection set. 

Alexandra Spence’s work explores earth’s material relationship with space via satellite disposal and debris, and the uncanny historic connections between electronic music and space exploration. Travelling through orbits, life cycles and transmissions, Stellar Nullius reconsiders the earth’s atmosphere, not as a liminal zone, but as a provisioning body whose wellbeing is deeply intertwined with our own.  Alexandra Spence is a sound artist/musician based in Eora (Sydney). Through her practice Alexandra reimagines the intricate relationships between the listener, the object, and the surrounding environment as a kind of communion or conversation. She has presented her work worldwide and released music with Room40, Longform Editions, MoreMars (with MP Hopkins), Canti Magnetici, and Mappa. Find Alexandra on Instagram and follow her work on Linktr.ee.   With thanks to the interview subjects: Dr Annie Handmer, Professor Iver Cairns, Alan F Jones, Dr Sarah Reeves, Martin Gotfrit. Work title borrowed from Elizabeth Povinelli.  Oscillations is presented by Jon Tjhia and sound design is by Erin Hyde (Sig Nu Gris).  Interested in learning more? Check out the Oscillations collection set. 

The Moral Frontier is a mosaic of thoughts, yarns and poetic reflections on the history of the Native Police, particularly the Native Mounted Police in Queensland. By reflecting on this history, The Moral Frontier exposes confronting truths about the pervasive relationships still at play in our society today.  Content Warning: Aboriginal and Torres Strait Islander listeners are advised that this audio work contains the voices of peoples now passed. The Moral Frontier contains confronting and distressing themes related to colonial and frontier violence.  Dakota is a Bundjalung and Gumbaynggirr man based on Turrbal Country. He is an educator, a researcher and interdisciplinary storyteller. His work consists of poems, installations and reflections that engage with Country, culture, history and healing. Dakota believes in healing Country and our communities through art and storytelling. Find Dakota on Instagram, Twitter or linktr.ee/dakotafeirer  Special thanks to Boe Spearim of Frontier War Stories and Heather Burke from Flinders University.   We acknowledge the unceded sovereignty of our Aboriginal and Torres Strait Islander nations, and the old people who fought, sacrificed and resisted the invasion, dispossession and colonising tactics employed by the crown.   We also acknowledge the ongoing resistance of First Nations Australians today.  Oscillations is presented by Jon Tjhia and sound design is by Erin Hyde (Sig Nu Gris). Interested in learning more? Check out the Oscillations collection set. 

In 1770, naturalists Joseph Banks and Daniel Solander reportedly saw wild soybeans in Botany Bay. The following century, the Japanese government sent soybeans to Australia as a gift. Thanks to Chinese miners in the 1800s, tofu was most probably part of gold rush diets, but it wasn’t until just a few decades ago – with the growing vegetarian movement, waves of migration and people asking for soy in their coffee – that the soybean became part of everyday lives. Cult tofu shops, local brewers making soy sauce, artisan tempeh makers and the blockbuster growth of meat substitutes reflect the changing fortunes of the soybean; a versatile ingredient that has also been used in plastics and cars.  The Culinary Archive Podcast is a podcast series with Lee Tran Lam exploring Australia’s foodways: from First Nations food knowledge to new interpretations of museum collection objects, scientific innovation, migration, and the diversity of Australian food.  This episode features Darwin Su, chef and founder of Ferments Lab; Shannon Martinez, chef and owner of Smith & Daughters and Smith & Deli; Sava Goto, chef and owner of Tofu Shoten; and Topher Boehm, brewer and co-founder at Wildflower Beer.  Image by Alana Dimou. Contributing editor Lee Tran Lam is a freelance journalist who has worked with The Sydney Morning Herald, Gourmet Traveller, The Guardian, SBS Food, FBi, ABC, Australian Financial Review, Rolling Stone and Turkish Vogue. She hosts The Unbearable Lightness of Being Hungry podcast— which has been recommended by Bon Appétit, Broadsheet, Concrete Playground and chosen to be archived by the National Library; co-founded Diversity In Food Media Australia; and has edited the "New Voices On Food" book, showcasing emerging creators from under-represented communities and their food stories. She was named a Future Shaper by Time Out Sydney.

From heartbeats to brainwaves, economic cycles to cosmic orbits, oscillations can be found everywhere. These seven stories bring Dakota Feirer, Alexandra Spence, Jinghua Qian, John Jacobs and Jane Curtis, Miyuki Jokiranta, Omar Musa and Sally Olds into the Powerhouse’s collection of over 500,000 objects to explore the stories behind them. Ranging from the poetic to the musical, the journalistic to the personal, these audio works offer stories, interpretations and investigations, bringing new light and sound to the museum’s collection. Presented by Jon Tjhia and sound design by Erin Hyde (Sig Nu Gris). Subscribe via the Powerhouse channel on Spotify, Apple Podcasts or wherever you get your podcasts.  Image Zan Wimberley, still from the beginning, the middle, the end, 2021, video, single channel, 15 mins and 1 second.

The tomato was dismissed as poison for 200 years in Italy, though it’s now celebrated as a staple of its cuisine. Italian migration to Australia helped make the tomato a mainstream ingredient here. Learn about the people who grow it, preserve it or cook it — whether it’s Italian Australians bottling passata in their ‘second kitchen’ (garage) in Sydney, the Cambodian refugee family growing heirloom tomatoes on a former zoo, or the Indigenous café owner serving bush tomatoes on her menu.  The Culinary Archive Podcast is a podcast series with Lee Tran Lam exploring Australia’s foodways: from First Nations food knowledge to new interpretations of museum collection objects, scientific innovation, migration, and the diversity of Australian food.  This episode features Sharon Winsor, Ngemba Weilwan woman and founder of Indigiearth and Warakirri Dining; Dr Cecilia Leong-Salobir, food historian and author; Joseph Vargetto, chef and owner of Mister Bianco; and Leakkhena Ma, farmer at Goldenfield. The Looking for Alibrandi footage was generously provided by Robyn Kershaw Productions.  Image by Alana Dimou. Contributing editor Lee Tran Lam is a freelance journalist who has worked with The Sydney Morning Herald, Gourmet Traveller, The Guardian, SBS Food, FBi, ABC, Australian Financial Review, Rolling Stone and Turkish Vogue. She hosts The Unbearable Lightness of Being Hungry podcast— which has been recommended by Bon Appétit, Broadsheet, Concrete Playground and chosen to be archived by the National Library; co-founded Diversity In Food Media Australia; and has edited the "New Voices On Food" book, showcasing emerging creators from under-represented communities and their food stories. She was named a Future Shaper by Time Out Sydney.

Australia is famous for its coffee culture, but it didn’t begin with Italian post-war migration. There was the rise of coffee palaces during the 19th century temperance movement and the influential Depression-era coffee shops run by Russian migrant Ivan Repin (who offered fresh-roasted beans when stale, day-old coffee was standard). The impact of Italian-Australian migration on our espresso obsession can’t be denied though: it's paved the way for an inclusive coffee culture that includes Ethiopian coffee ceremonies and Indigenous business owners presenting native ingredients and reconciliation in a cup.  The Culinary Archive Podcast is a podcast series with Lee Tran Lam exploring Australia’s foodways: from First Nations food knowledge to new interpretations of museum collection objects, scientific innovation, migration, and the diversity of Australian food.  This episode features Paul van Reyk, author of True to the Land: A History of Food in Australia; Tinsae Elsdon, owner of Djebena Coffees; Nick Repin, grandson of Ivan Repin; Peter Patisteas and Shawn Andrews, co-owners of DHUWA Coffee; Sharon Winsor, Ngemba Weilwan woman and founder of Indigiearth and Warakirri Dining; and Leonard Janiszewski, co-author of In Their Own Image: Greek Australians.   Image by Alana Dimou. Contributing editor Lee Tran Lam is a freelance journalist who has worked with The Sydney Morning Herald, Gourmet Traveller, The Guardian, SBS Food, FBi, ABC and Turkish Vogue. She hosts The Unbearable Lightness of Being Hungry podcast— which has been recommended by Bon Appétit, Broadsheet and Concrete Playground; co-founded Diversity In Food Media Australia; and edited the "New Voices On Food" book, showcasing emerging creators from under-represented communities and their food stories. She was named a Future Shaper by Time Out Sydney. 

Australian colonial history begins with beer: the Endeavour left England with 250 barrels on board. The drink reflects the changing fortunes of women, from Australia’s first female licensee to the 1960s feminist fight to allow women into public bars. Beer has always bubbled over into politics, with Reschs’ owner, Edmund Resch, thrown into a local internment camp when WWI broke — punished for his German roots, despite living here since age 16. Politicians love to be associated with beer: Prime Minister Bob Hawke set an ale-drinking world record in 1954 and has a craft beer named after him. Beer has given us a national icon – Vegemite. Now, brewers like Wildflower in Sydney are doing fascinating experiments with beer using native grains, wild yeasts and local flowers — showing how far the drink has evolved since its initial arrival into Sydney.  The Culinary Archive Podcast is a podcast series with Lee Tran Lam exploring Australia’s foodways: from First Nations food knowledge to new interpretations of museum collection objects, scientific innovation, migration, and the diversity of Australian food.  This episode features Professor Clare Wright OAM, historian, author, broadcaster and public commentator; Alice Resch Le Cras, great-granddaughter of Edmund Resch and host of the Edmund Resch Series podcast; Karli Small, Head Brewer at The Grifter Brewing Co.; Topher Boehm, brewer and co-founder at Wildflower Beer; Claudia Moodoonuthi, Kaiadilt woman and artist; and Paul van Reyk, author of True to the Land: A History of Food in Australia.  Image by Alan Dimou.  Contributing editor Lee Tran Lam is a freelance journalist who has worked with The Sydney Morning Herald, Gourmet Traveller, The Guardian, SBS Food, FBi, ABC, Australian Financial Review, Rolling Stone and Turkish Vogue. She hosts The Unbearable Lightness of Being Hungry podcast— which has been recommended by Bon Appétit, Broadsheet, Concrete Playground and chosen to be archived by the National Library; co-founded Diversity In Food Media Australia; and has edited the "New Voices On Food" book, showcasing emerging creators from under-represented communities and their food stories. She was named a Future Shaper by Time Out Sydney.

Long before local authorities tried to ban sliced bread, Australia was home to the world’s first bakers. Grindstones, some 65,000 years old, suggest Indigenous communities have been baking for millennia and there’s an amazing effort to bring back this cultural knowledge and revive Indigenous grains. While Australia has had a fraught relationship with locally grown wheat, there’s a growing movement to embrace Australian heritage grains, backed by open-minded chefs who want to knead such enduring flour into ultra-local pasta, pizza and bread.    The Culinary Archive Podcast is a podcast series with Lee Tran Lam exploring Australia’s foodways: from First Nations food knowledge to new interpretations of museum collection objects, scientific innovation, migration, and the diversity of Australian food.  This episode features Jacob Birch, Gamilaraay mari and researcher; Aunty Bernadette Duncan, Kamilaroy woman and coordinator of the Garragal Women's Language and Culture Network; Dr Angela Pattison, lead researcher on Indigenous Grasslands for Grains; Kerrie Saunders, Gomeroi woman and technician on Indigenous Grasslands for Grains; Paul Farag, executive chef of Nour and AALIA; Luke Finlay, Operations Manager of  Wholegrain Milling Co; and Paul van Reyk, author of True to the Land: A History of Food in Australia.  Contributing editor Lee Tran Lam is a freelance journalist who has worked with The Sydney Morning Herald, Gourmet Traveller, The Guardian, SBS Food, FBi, ABC, Australian Financial Review, Rolling Stone and Turkish Vogue. She hosts The Unbearable Lightness of Being Hungry podcast— which has been recommended by Bon Appétit, Broadsheet, Concrete Playground and chosen to be archived by the National Library; co-founded Diversity In Food Media Australia; and has edited the "New Voices On Food" book, showcasing emerging creators from under-represented communities and their food stories. She was named a Future Shaper by Time Out Sydney.   Image by Alana Dimou. 

The history of Australia can be told in an oyster shell. For thousands of years, First Nations communities feasted on these mollusks and collected them in middens – a millennia old example of sustainability. Sydney was literally constructed from oysters. Our roads were paved with them because the shellfish was so abundant, and the crushed-up shells were used in buildings. Oysters also tell a story about migration (thanks to oyster saloons run by Greek migrants) and our ecological future with oysters being used to repair reef damage and revive coastline.  The Culinary Archive Podcast is a podcast series with Lee Tran Lam exploring Australia’s foodways: from First Nations food knowledge to new interpretations of museum collection objects, scientific innovation, migration, and the diversity of Australian food. Featuring Chris Jordan, Indigenous chef and owner of Three Little Birds; Leonard Janiszewski and Effy Alexakis, co-authors of In Their Own Image: Greek Australians; Jody Orcher, Ualarai Barkandji woman and bush foods educator; Alex Goad, industrial designer and founder of Reef Design Lab; and Dr Chris Gilles, marine biologist and at the time of recording, program director of The Nature Conservancy (Chris is currently the managing director of SeaGen Aquaculture).  Contributing editor Lee Tran Lam is a freelance journalist who has worked with The Sydney Morning Herald, Gourmet Traveller, The Guardian, SBS Food, FBi, ABC and Turkish Vogue. She hosts The Unbearable Lightness of Being Hungry podcast— which has been recommended by Bon Appétit, Broadsheet and Concrete Playground; co-founded Diversity In Food Media Australia; and edited the "New Voices On Food" book, showcasing emerging creators from under-represented communities and their food stories. She was named a Future Shaper by Time Out Sydney.   Join us on September 29th for the launch of the podcast at the Powerhouse Late. Image by Alana Dimou.

Ever wonder how a by-product of beer gave us Vegemite, an Australian icon? Have you heard about the bakers producing pide, damper or Johnny cakes from ancient Middle Eastern or Indigenous grains? Did you know our roads and buildings used to be constructed from oysters? Or that soybeans can be transformed into plastic and cars?   To find out about all these things and much more, join Lee Tran Lam and Australian chefs, business owners, researchers and growers on The Culinary Archive Podcast, a six-part series by the Powerhouse exploring Australia’s foodways.  Join us on September 29th for the launch of the podcast at the Powerhouse Late. Image by Alana Dimou.

We discuss the eucalypt as sentinel and witness to contested, obscured and enduring histories in Australia. What can we learn from trees that have withstood and absorbed the past, and what can this teach us about our futures?  Featuring Alisa Bunbury, Grimwade Collection Curator at the Ian Potter Museum of Art; Julie Gough, artist, writer and curator; and hosted by Agatha Gothe-Snape, Powerhouse Artistic Associate and co-curator of Eucalyptusdom.    Interested in learning more? Eucalyptusdom is showing at Powerhouse Ultimo from 11 October 2021 – 28 August 2022. It is accompanied by a publication which expands upon the research and creative output of the exhibition, showcasing more than 20 creative practitioners commissioned to produce new works in dialogue with 500+ objects from the Powerhouse collection.  The series is programmed by Rebecca Gallo, produced by Ayeesha Ash and Cara Stewart, edited by Mara Schwerdtfeger, and sound designed by Jane Sheldon.  

Alchemy is at once a medieval science, a speculative philosophy, a force that transforms matter in mysterious ways, and a metaphor for transformation. We look at how plants and trees become forces for symbolic and material transformation in Western art and culture.    Featuring Gina Buenfeld-Murley, curator at Camden Art Centre; Janet Laurence, contemporary Australian artist; and hosted by Agatha Gothe-Snape, Powerhouse Artistic Associate and co-curator of Eucalyptusdom.  Interested in learning more? Eucalyptusdom is showing at Powerhouse Ultimo from 11 October 2021 – 28 August 2022. It is accompanied by a publication which expands upon the research and creative output of the exhibition, showcasing more than 20 creative practitioners commissioned to produce new works in dialogue with 500+ objects from the Powerhouse collection.  The series is programmed by Rebecca Gallo, produced by Ayeesha Ash and Cara Stewart, edited by Mara Schwerdtfeger, and sound designed by Jane Sheldon.  

When we speak of the vitality of plants, trees and knowledge, we are talking about the potency the ever-present power of Country. As Wiradjuri artist and poet Jazz Money has written, “no colonial intervention can alter the truth of Country”.   Featuring Zena Cumpston, Barkandji woman and researcher, writer, consultant and curator; Nici Cumpston, Barkandji woman and artist, curator, writer and educator; David Doyle, Barkandji man and artist; and hosted by Emily McDaniel, Wiradjuri woman of the Kalari Clan, Director, First Nations at the Powerhouse and and co-curator of Eucalyptusdom.  Interested in learning more? Eucalyptusdom is showing at Powerhouse Ultimo from 11 October 2021 – 28 August 2022. It is accompanied by a publication which expands upon the research and creative output of the exhibition, showcasing more than 20 creative practitioners commissioned to produce new works in dialogue with 500+ objects from the Powerhouse collection.  The series is programmed by Rebecca Gallo, produced by Ayeesha Ash and Cara Stewart, edited by Mara Schwerdtfeger, and sound designed by Jane Sheldon.  

What does traditional land management in our changing climate teach us about the vulnerability of eucalypts, and the significance of their survival?   Featuring Dean Nicolle, founder and manager of Currency Creek Arboretum; Oliver Costello, Bundjalung man and co-founder of Firesticks Alliance Indigenous Corporation; and hosted by Agatha Gothe-Snape, Powerhouse Artistic Associate and co-curator of Eucalyptusdom.  Interested in learning more? Eucalyptusdom is showing at Powerhouse Ultimo from 11 October 2021 – 28 August 2022. It is accompanied by a publication which expands upon the research and creative output of the exhibition, showcasing more than 20 creative practitioners commissioned to produce new works in dialogue with 500+ objects from the Powerhouse collection.  The series is programmed by Rebecca Gallo, produced by Ayeesha Ash and Cara Stewart, edited by Mara Schwerdtfeger, and sound designed by Jane Sheldon.  

How do we tell stories through trees, and how do trees tell us their stories? When trees are viewed as kin rather than inanimate others, how might this change our understanding of our place in the world and our sense of identity?   Featuring Professor Brian Martin, Bundjalung, Muruwari and Kamilaroi man and Director of Wominjeka Djeembana Indigenous Research Lab at Monash Art, Design and Architecture faculty; Charlotte Day, Director at Monash University Museum of Art; Sophie Cunningham, writer, talker and teacher, and author of City of Trees; and hosted by Agatha Gothe-Snape, Powerhouse Artistic Associate and co-curator of Eucalyptusdom.    Interested in learning more? Eucalyptusdom is showing at Powerhouse Ultimo from 11 October 2021 – 28 August 2022. It is accompanied by a publication which expands upon the research and creative output of the exhibition, showcasing more than 20 creative practitioners commissioned to produce new works in dialogue with 500+ objects from the Powerhouse collection.  The series is programmed by Rebecca Gallo, produced by Ayeesha Ash and Cara Stewart, edited by Mara Schwerdtfeger, and sound designed by Jane Sheldon.