6003130 Hackney Stallion, Mathias A 1, in Harness, Prize-winner at the London Hackney Show, International Horse Show, Olympia, etc (b/w photo) by English Photographer, (20th century); Private Collection; (add.info.: Hackney Stallion, Mathias A 1, in Harness, Prize-winner at the London Hackney Show, International Horse Show, Olympia, etc. Illustration for British Breeds of Live Stock (2nd edn, Board of Agriculture and Fisheries, London, 1913).); by Look and Learn.