We had to wait until the snow had somewhat hardened, and the stream up which we were to proceed had been frozen over.  Uncle Donald had made for Rose to sleep in a bag of buffalo-robes lined with softer furs, which kept her perfectly warm.  She was the only person who was to enjoy the privilege of a sleigh, drawn by Whiskey and Pilot, and guided by Uncle Donald.  The rest of us were to travel on snow-shoes, a mode of proceeding which, though fatiguing, kept us warm.