3 P.M.
_ Thursday , July 3d . _ -- On the Mackenzie . Reached the ` head of the line ' -- that is , the country where they have to track boats on the line . At 3 P.M. reached the mouth of the Liard , which seemed as big as the Peace River . It comes in on the left . A grand scene here . On ahead is Fort Simpson on a very high bluff -- the most picturesque spot we have seen yet on this trip .