Alexander Henderson began his working life as an accountant in Scotland and emigrated to Canada in 1855. He worked as a merchant in Montreal, taking up photography as a hobby. His earliest dated photographs were taken in 1858. His main interest was landscape photography, and he published a series entitled 'Canadian Views and Studies' in 1865. Some time after this he set up as a professional photographer and by the 1890s, he was the manager of the Canadian Pacific Railway Photography Department.