William James Galloway was recorded in the 1881 census as living at 2 Compton Terrace, Islington, with his 30 year old wife Kate, who was born in Worthing, and their six daughters and two sons.
Galloway appears to have been a fairly prosperous collector. In 1881 in his business as a baker and confectioner he was employing four boys.
Three Whistler drawings from his collection were sold after his death, at auction at Sotheby's, London, 23 March 1897 (lots 160-162), San Rocco (M.772), Nude Study and Draped Study. The Venice pastel may have been bought as early as 1881 and was certainly in Galloway's possession by 1886.
UK census 1881, from http://www.familysearch.org (accessed 2004); Nude and draped studies (M.1484)