There were seven puppies in the team. The others had been born earlier in the year and were nine and ten months old, while White Fang was only eight months old. Each dog was fastened to the sled by a single rope. No two ropes were of the same length, while the difference in length between any two ropes was at least that of a dog's body. Every rope was brought to a ring at the front end of the sled. The sled itself was without runners, being a birch-bark toboggan, with upturned forward end to keep it from ploughing under the snow. This construction enabled the weight of the sled and load to be distributed over the largest snow-surface; for the snow was crystal-powder and very soft. Observing the same principle of widest distribution of weight, the dogs at the ends of their ropes radiated fan-fashion from the nose of the sled, so that no dog trod in another's footsteps.
There was, furthermore, another virtue in the fan-formation. The ropes of varying length prevented the dogs' attacking from the rear those that ran in front of them. For a dog to attack another, it would have to turn upon one at a shorter rope. In which case it would find itself face to face with the dog attacked, and also it would find itself facing the whip of the driver. But the most peculiar Virtue of all lay in the fact that the dog that strove to attack one in front of him must pull the sled faster,
