Hi Barb - looks like this thread is almost 17 years old, so I'm not sure if you will get this or not.
Alexander Stewart was a brother of my GGGrandfather, John Neil Stewart. They were both sons of Murdo Stewart and Ann Morrison of Vatisker, Lewis.
Alexander was posted by the HBC to La Pierre House in the Yukon, married a local Gwitchin woman named Catherine and lived out his life in the Peel River area of the Yukon in Canada.
There are still descendants in the area that carry the Stewart surname.
Alexander (Sandy) Stewart