University of Cambridge, Scott Polar Research Institute
University of Bristol, Clifton Hill House Hall
Museum of South Georgia, South Atlantic
Archive of Twenty-first Century Sculpture, drawings and maquettes, Cass Foundation Centre, Goodwood
The Herb Society, Sulgrave Manor

work on loan in public view

Wildfowl and Wetlands Trust, Slimbridge

publications featuring work 

Historic Gardens of Oxfordshire (2007) Timothy Mowl. Tempus ISBN 978-0-7524-4086-6
...coaxing his stone into semi-figurative forms of brooding power, as in his 'Wight Man' and 'Arch'

Responses - Carvings and Claywork: Jon Edgar Sculpture (2008) Hesworth Press ISBN-13 978-0-9558675-0-7

Sussex Life May 2010: Jon Edgar: A Life in Sculpture (see pdf)

profile by Fran Monks, 2010: How to Make a Difference

Film references

Spirit in Mass - A Sculptor's Journey: Alan Thornhill (2008) 
Memory and Desire - 30 years in the Wilderness with Stephen Duffy (2009)