found: Meredith, G.W.L. Training horses for races: a handbook for amateur beginners, 1928:t.p. (Lieut.-Col. Geoffrey Brooke, D.S.O.)
found: Higginson, A.H. British and American sporting authors, 1949:p. 301 (Major General Geoffrey Brooke, b. 1884; was a colonel in 1918; at one time commanded the 16th Lancers; author of Horse sense and horsemanship of today and The way of a man with a horse)
found: Training young horses to jump, 1913:t.p. (Geoffrey Brooke)
found: Buckley, A.K. The Keeneland Association Library, 1958:p. 19 (Brooke, Geoffrey Francis Heremon)
found: LC database, Jan. 24, 2017(hdg.: Brooke, Geoffrey Francis Heremon, 1884-1966 )