In 1954, he began attending the Ontario College of Art in Toronto, where he met his wife, Marlene Shuster.
[3] In 1968, a retrospective of his work was held at the McIntosh Memorial Art Gallery at the University of Western Ontario.
[4] In 2011, Blazing Figures: A Retrospective of Robert Markle opened at the Gallery de Boer in Owen Sound.
[5] The Robert Markle fonds (SC076) in the Edward P. Taylor Library & Archives, Art Gallery of Ontario, documents his life and work.
)[7] Markle also did wall-sculptures for the Ellen Fairclough Building in Hamilton (1981) and the Metro Toronto Convention Centre (c. 1984), and painted outdoor murals in Mount Forest (1986) and Owen Sound, Ontario (1987).
[2] In 1990, Markle's truck hit a tractor in Mount Forest, Ontario, near the farm that he and his wife shared.