Both the Canadian Pacific Railway and Ontario Hydro made offers to buy the Guelph system. Ontario Hydro won out and took title to the Railway, under the name Ontario Hydro Electric Railways–Guelph District, on May 21, 1921. Some lines were rebuilt and some extended, and Sunday service began July 25, 1921. Seven single-truck Birney cars numbered 219 to 225 were acquired in 1922. These were built by Canadian Brill at the former Preston Car & Coach plant in nearby Preston, Ontario.