Reverend Henry Usborne from Portage du Fort built a mill at Braeside in 1870. It was purchased by Gillies Bros. of Carleton Place in 1873. Expanded significantly in 1890’s, the mill exported mainly white pine lumber from this location using rail to the US and overseas markets. Circular saws were replaced with more efficient band saws which increased annual production to 35 million board feet. Numerous buildings located at this site included: lumber sheds, an oil house, the Canadian Pacific Railway station, a storage shed, drive shed, sorting tables, lathe mill, a brick chimney, saw mill with cupola (built by Usborne) and a bullet nose refuse burner. This mill was entirely destroyed by fire June 23 1919.