The fonds consists of legal files (1917-1958) relating to the Law Society of Alberta, Canadian Bar Association, International Mineral Separator Co., Alberta Gas Trunk Line Co., Canada. Department of Mines and Resources (Alberta geological surveys), Toole Peet Ltd., Strand Oil Co., High River Wheat and Cattle Co., and Bert C. Berry. Also consists of Macleod's articles, notes and correspondence about the fur trade, western personalities and the NWMP, including reference material and photographs he gathered while researching his articles. Includes family photographs.