Career
He was junior professor of drawing at the Royal Military College, Addiscombe from 1855 to 1861. According to Her Majesty Vibart, writing in 1894, Callow "never became a favourite of the cadets, for he was a jaundiced, saturnine character with no good-humour or geniality about him." He was master of landscape at the Royal Military Academy, Woolwich, 1861-1865 and professor at Queen"s College, London, 1875-1878. He painted marine subjects and landscapes, mostly in watercolour.
