COOPER, THOMAS SIDNEY , English painter, was born at Canterbury on September 26, 1803. At the age of 20 he went to London and was admitted as a student of the Royal Academy. He then returned to Canterbury, where he was able to earn a living as a drawing-master and by the sale of sketches and drawings. By showing his first picture at the Royal Academy (1833) he began an unprecedentedly prolonged career as an exhibitor. Cooper's name is mainly associated with pictures of cattle or sheep, of which he produced many hundreds. He was elected A.R.A. in 1845 and R.A. in 1867. He presented to his native place, in 1882, the Sidney Cooper art gallery. He wrote his reminiscences, under the title of My Life, in 1890, and died on Feb. 7, 1902.