Enjoyable story. D.A. Munro had his life saved by that leg according to an item on page 364 in this on-line P.River history book.
http://www.ourroots.ca/e/toc.aspx?id=8204 It seems he fell into a snowbank and was found because of the leg sticking out of the snow. A McRae search shows several pages of McRae tidbits including a pic of Mrs. McRae with a dog team. Butch