Background
Horsley was the son of the painter John Callcott Horsley.
Horsley was the son of the painter John Callcott Horsley.
He was articled to Norman Shaw from 1879 to 1882, and in 1883 became his assistant. From 1884 to 1885 he was assistant to John Dando Sedding. He was the first recipient, in 1887 and again in 1888, of the Owen Jones Studentship of the Royal Institute of British Architects (Royal Institute of British Architects) which took him twice to Italy.
A Royal Institute of British Architects associate in 1890, he left the institute in 1892 in protest against plans for compulsory registration of architects.
He rejoined as a fellow in 1906. From 1911 to 1913, Horsley was president of the Architectural Association.