Canadian Furniture World and the Undertaker, September 1915, p. 55: "NEW WOODWORK FACTORY AT LONDON: The London Art Woodwork Co., Ltd., London, Ont., capitalized at $40,000, has received an Ontario charter to make furniture and fittings for churches, schools, banks, offices etc. Provisional directors are: Joseph Keller, P. J. Mugan, J. J. Callaghan, E. R. Dennis, and M. F. Forristal."
Canadian Furniture World and the Undertaker, June 1917, p. 40: "J. J. Callaghan, well known in London, Ont., business circles, and formerly in the piano business, has become interested in the manufacture of phonographs. The London Art Woodwork Co., Ltd., in which he is interested, are turning out the Lawcola phonograph."
Canadian Woodworker, July 1917, p. 66: "The London Art Woodwork Company, London, Ontario, are manufacturing the Lawcola phonograph. J.J. Callaghan, well known in London, Ontario business circles, and formerly in the piano business, is interested in this company."
Canadian Furniture World and the Undertaker, August 1917, p. 38: "The London Art Woodwork Co., makers of the Lawcola phonograph, contemplate extending their factory at London. J. J. Callaghan, formerly in the piano business at London, is manager."
National Post, April 1918, p. 15: "Among the firms which are building this spring is the London Art Woodwork Company. About $20,000 will be expended on additions to its plant. A sum of $10,000 will be spent in building a new boiler house and dry kilns by the London and Petrolea Barre Company."
Industrial Canada, Vol 22, 1921, p. 235: "London Woodworkers Limited are successors to the London Art Woodwork Company Limited of London, Ontario, who have been in operation since 1914."
, August 19, 1929, p. 13. Detail of a classified ad by Heintzman & Co., 10139 Jasper Avenue, Edmonton, Alberta including a Lawcola phonograph.