Source: Per personal message from Allan Miller at Facebook.
Family Search: When Robert Douglas was born on 8 July 1874, in Petrolia, Lambton, Ontario, Canada, his father, James Douglas, was 25 and his mother, Margaret Moore, was 22. He married Emma Whitehouse on 5 November 1902, in Petrolia, Lambton, Ontario, Canada. They were the parents of at least 1 daughter. He lived in Lambton, Ontario, Canada in 1901. He registered for military service in 1915. In 1915, at the age of 41, his occupation is listed as driller.