Muir was born in Edinburgh, Scotland on 10 November 1919.[1] After his father died in 1920, he and his mother immigrated to Canada.[2] After leaving school in grade 8, he worked in the coal mines until injuries ended his ability to do so.[2] Before he was injured for the final time, he was elected as the secretary of his United Mine Workers of America (UMW) local.[2] After recuperating from his injuries, he worked in insurance for London Life until he was elected to parliament.[1] He later served as chair of the Miners' Hospital in Cape Breton.[3]
^The Canadian Press (29 March 1979). "Tory MP becomes Senator as Trudeau names five to chamber". The Globe and Mail. Toronto. p. 2.
^MacLean, Greg (31 August 2011). "Bob Muir dead". CJCB Radio AM 1270. Sydney, Nova Scotia. Archived from the original on 31 March 2012. Retrieved 3 September 2011.