by (United States)L.A.Peterson;by (United Kingdom)A.P.M.Lockwood; by (United States)C.Drentea;by (United Kingdom)A.E.Schoflon; by (United States)C.Gattegno;by (United Kingdom)A.S.Hornby; by (United States)E.A.Peel;by (United Kingdom)T.Holdich; by (United States)M.A.Leontovich;by (United Kingdom)A.G.Sitenko; by (United States)D.Daiker;by (United Kingdom)A.S.Hornby; by (United States)J.C.Keegel;by (United Kingdom)A.D.McGettrick; by (United States)J.Glaser;by (United Kingdom)A.M.Burt; by (United States)L.A.Frakes;by (United Kingdom)D.H.Tarling; by (United States)L.C.leighton;by (United Kingdom)C.E.Eckersly;