Gage was born on 14 December 1871 in
Aberdeen, Scotland, the son of Robert Gage. Gage was admitted Fellow of the Linnean Society in 1908. He worked on the manuscript by
Benjamin Daydon Jackson to produce a
History of the Linnean Society of London (1938) which was further expanded upon by
W.T. Stearn in 1988. He was married to Jean Sturt Bruce of Kildrummy. == Selected publications ==