Sentence:  Bailly , after leaving Fort Snelling in August 1821 , was forced to leave some of the cattle at the Hudson's Bay Company's <WSD>post</WSD> on Lake Traverse `` in the Sieux Country '' and reached Fort Garry , as the Selkirk Hudson's Bay Company center was now called , late in the fall . 
Meaning of the word marked with <WSD> tags:  the position where someone (as a guard or sentry) stands or is assigned to stand