Jane was the Douglas' second daughter. She married A.G. Dallas in March 1858, who succeeded Douglas as head of the Western Department of the Hudson's Bay Company. After the death of her first child in 1860, Jane and her husband left Victoria for Rupert's Land, where A.G. Dallas had been appointed Governor.

The British Columbia Archives and Records service contain a collection of letters written to her older sister Cecilia in 1861 and 1862. These letters provide a unique insight into the life of a Metis woman, whose only life experience had been that of the Western Canadian fur trade.