The Call of The Wild by Jack London Chapter 5 Page 16

With the newcomers hopeless and forlorn, and the old team worn out by twenty-five hundred miles of continuous trail, the outlook was anything but bright. The two men, however, were quite cheerful. And they were proud, too. They were doing the thing in style, with fourteen dogs. They had seen other sleds depart over the Pass for Dawson, or come in from Dawson, but never had they seen a sled with so many as fourteen dogs. In the nature of Arctic travel there was a reason why fourteen dogs should not drag one sled, and that was that one sled could not carry the food for fourteen dogs. But Charles and Hal did not know this. They had worked the trip out with a pencil, so much to a dog, so many dogs, so many days, Q.E.D. Mercedes looked over their shoulders and nodded comprehensively, it was all so very simple.