[1] Granger was articled to his uncle, Andrew Heiton, in 1876, became his assistant in the early 1880s, and eventually his partner.
[1] After serving in the First World War, Heiton had trouble producing drawings for clients due to health issues.
He formed a partnership with John Sibbald McKay, who had previously worked as his assistant between 1913 and 1915.
[1] In his younger years, Heiton was a prominent rugby player and cricketer, playing for Perthshire CC.
[1] For a period, Heiton and his uncle lived at a double villa named Craigievar and Darnick (itself now Category B listed),[13] on Kinnoull Terrace in Perth,[14] and in one of the same name in Darnick, Roxburghshire.