His work included cover illustrations for the Radio Times (including the 1935 Christmas edition)[1] and posters for the London and North Eastern Railway, the Empire Marketing Board,[2] London Transport, and the General Post Office.

[4] Cooper was born in Souris, Manitoba, Canada,[5] on 5 March 1890,[6] the son of an Irish farmer.

The two produced a 4 m × 2 m (13.1 ft × 6.6 ft)[8] painting "Christ in Calgary" (1913; thought lost),[9] which was exhibited unsigned at the Royal Picture Gallery there for six months, described by the Calgary News-Telegram (one of whose street-vendors was depicted in the painting[8]) as showing: A crowd of hurrying people is on the street hurrying west on the side and corner near the old Royal hotel, and intermingled with this crowd is the Indian, the squaw with her child in a papoose, the lady stenographer with her beau; the lumberman chatting with his companion on the corner, and, leaning up against the wall of the hotel; the policeman talking to a nurse and taking notes on an accident; the mother and her little girl; the Negro standing unconcerned, and other characters; but the most prominent character in the picture is a large representative figure of Christ standing on the corner of the pavement, while directly in front of him and looking up into his face with a frightened look is a woman of the street, bearing all the characteristics of such a woman, and dressed in red.On being identified as one of the artists Cooper's only comment, to a newspaper, was "We have nothing to say about it except what appears on the canvass".

[9] During World War I he was in Flanders with the Canadian Black Watch, rising to Regimental Sergeant Major, before being discharged in 1919.

[9] From 1936 to 1940, he was principal of the London branch of the Reimann School of Commercial and Industrial Art.