Leighton & Gilbert was a real estate company run by Henry Leighton and Orville N. Gilbert. Headquartered in the Grain Exchange in Calgary, they advertised available farmland for sale in Alberta, near Edmonton and Calgary (especially in the Rosebud Valley). They were official agents of the Canadian Pacific Irrigation Colonization Co. - a subsidiary of the Canadian Pacific Railway responsible for improving and selling lands surrounding the railway.

William Wilson Leighton was born on April 26, 1832, in London, Middlesex, England. He was a clerk at the Geological Society of London from 1867 until his death on February 16, 1886, in London, England.