Series contains photographs including: carte-de-visite and cabinet-format portraits of unidentified men, women, and children, possibly members of the Cole and Rochester families and their friends, ca. 1860-1890; a composite photograph of the mayor (John Rochester, Jr.) and aldermen of Ottawa, Ont., 1885; a portrait of Dr. H.P. Hill, Ottawa, Ont., 1886; activities of Lloyd Rochester and his brother and sister at the Rochester family home, "Maplelawn", 529 Richmond Road, Ottawa, Ont., ca. 1895-1905; a group photograph of officers of the Princess Louise Dragoon Guards regiment, Rockliffe Camp, Ont., June-July 1905; Frances Ross and her father, Kingsmere, Quebec, ca. 1908-1909; and activities of Lloyd Rochester at McGill University, including membership of the Theta Delta Chi fraternity, Montreal, Quebec, 1913-1915 and 1919-1921.
Other photographs document the activities of Lloyd Rochester in England, France, and Germany during the First World War, 1915-1919, serving in the following units: 27th Battery, Canadian Field Artillery, in France; Canadian Forestry Corps, Esher, England; Royal Flying Corps, Reading, England; Central Flying School, Royal Flying Corps, Upavon, England; Nos. 79 and 87 Squadrons, Royal Air Force, Bickendorf, Germany; personnel and equipment of No. 21 Squadron, Royal Flying Corps, England, 1916, including photographs of the Curtiss "Canada" aircraft undergoing tests at Farnborough, England; officers who served with Lloyd Rochester in the Royal Flying Corps/Royal Air Force, including Peregrine Fellows, Wilfred Freeman, M.B. Frew, Jack Goddard, Roy Grandy, George Mercer, and S.L. Pope, ca. 1915-1919; social activities of Lloyd Rochester and friends in England, including attending garden parties, playing tennis, and punting on the Thames River, ca. 1915-1919; views of Dinant and Namur, Belgium, and Cologne, Germany, ca. 1919; and a visit of Lloyd Rochester and Jack Goddard to California en route from England to Canada, 1919.
Photographs also record a timber investigation, Quetico Park, Ont., 1920-1921; Canadian Air Force refresher training, Camp Borden, Ont., 1921; Lloyd and Laurence Rochester's visit to the Wembley Exhibition, London, England, 1924; activities of Lloyd Rochester in the discovery and development of mines in northern Quebec and Ontario, including the Abana (Aconda?) mines near La Reine, the Opemiska copper mine (in conjunction with Lloyd Springer) near Chibougamou, the McWatters gold mine near Noranda, and a trip to Hudson Bay with Pete Glyn and Bob Cockeram, as well as the formation and early operations of Prospectors Airways Co. Ltd., ca. 1925-1935; activities of Lloyd and Frances Rochester's children Ian, Richard, and Toby, and of the Rochester family dogs, at "Maplelawn", Ottawa, Ont., ca. 1935-1939; Lloyd Rochester in his office at the Department of Munitions and Supply, Ottawa, Ont., ca. 1939-1945; visit of Lloyd Rochester to Opemiska, ca. August 1957; and a view of men present around the time of the Opemisca copper discovery, Que., 1929, showing Cyril Young, Freddie Bone, George Glendinnen, Lloyd Rochester, Carr-Harris, and Leo G. Springer.
Photos by unknown photographers and by the following identified photographers: W.C. Adams, Owen Sound; I. Bennetton, Winnipeg; William Craig, Owen Sound; David C. Ferguson, Ottawa; Gagen and Fraser, Toronto; W.J. Gould, Owen Sound; Samuel J. Jarvis, Ottawa; S. Langfier, London, England; Charles A. Lee, Listowel; Miss Alvira Lockwood, Ottawa; Lorne M. McCoy, Ottawa; Nicholls and Parkin, Winnipeg; Pittaway and Jarvis, Ottawa; Lloyd B. Rochester, Ottawa; John Ross, Winnipeg; Royal Studio and Art Rooms, Ottawa; Herbert E. Simpson, Toronto; William James Topley, Ottawa; E. Tucker, Owen Sound; James D. Wallis, Ottawa; J. Lambert Weston, Folkestone, England; George E. Willis, Carleton Place.