[2] He was educated at St Paul's School, London, and Trinity College, Cambridge, gaining scholarships at both.

[6] Garnett was an examiner at the Board of Trade from 1904 to 1912, during which time he was called to the bar from the Inner Temple in 1908.

He was Principal of the Manchester College of Technology from 1912 to 1920, then returned to the capital city as Secretary of the League of Nations Union from 1920 to 1938).

[1] His daughter Peggy was later convinced that her father's career was "wrecked by his gift for launching daringly radical and eventually successful new ideas two decades too soon.

The Garnetts lived at 37 Park Town, North Oxford, from 1939 until 1955, when they moved to the Isle of Wight.