Simpson, T., & Simpson, A. (1843). Narrative of the discoveries on the north coast of America: Effected by the officers of the Hudson's Bay Company during the years 1836-39. Richard Bentley.

Simpson, Thomas, and Alexander Simpson. Narrative of the Discoveries on the North Coast of America: Effected by the Officers of the Hudson's Bay Company During the Years 1836-39. Richard Bentley, 1843.