John's career began at the Carlisle Parks Department followed by becoming a student at Askham Bryan in York and then as a student at the Royal Botanic Garden Edinburgh. He remained at RBGE as a foreman in the Alpine Department until 1975, moving to the Northern Horticulture Society at Harlow Carr, Harrogate until 1980. John then moved to become Curator of the Royal Horticultural Society's Garden at Wisley until 1988 at which point he returned to the Royal Botanic Garden Edinburgh as Director of Horticulture until his retirement in 2000.
The Scotsman Obituary: (right click, open link in new tab) https://www.legacy.com/uk/obituaries/scotsman-uk/name/john-main-obituary?id=54619746
Elizabeth Ewing's obituary by John R. Lee can be found here: (right click, open link in new tab) https://archive.org/stream/glasgowna141519401946ande/glasgowna141519401946ande_djvu.txt
Swedish medical doctor and zoologist who made collecting trips to Afghanistan in 1947 and 1957-1962.
(right click, open link in new tab) https://plants.jstor.org/stable/10.5555/al.ap.person.bm000152397