Harold Campbell Mason was an OAC alumnus, farmer and agricultural history enthusiast who established an endowment in 1986 that supports the agricultural history collection. His family recently made a gift of $10,000 to further enhance this work. Mason earned an associate degree from OAC in 1915 and his graduate degree (B.S.A.) in 1920. He was the farm editor of The London Advertiser for 11 years and later head of the agriculture department of the James Fisher Co. in Toronto, in charge of advertising for Purina Feeds and Bray Chicks.
He farmed 190 acres at Wilton Grove, Ont., stocked with purebred Jerseys and his hobby was agricultural history. The Library also has a small collection of his agricultural history articles, research materials and notes.