During the day, when the posts and the fastenings were all ready, the wagon was brought out and the yaks yoked up. The elements of the fort were attached to the wagon, in the manner that they were to be transported. As there were three sections of the fort, one on each side of the wagon body and one below the axles, it was provided that the six should form three divisions; the Professor and Ralph, John and Tom, and Harry and George the couples for setting up the fort.

As Harry and George were the most familiar with the animals, and knew better than the others how to handle them, it was made a part of their duty, when the signal was given, to unyoke and turn the yaks to the proper place at the side of the wagon.

While this was being done, the Professor and Ralph were to detach the section on the side of the wagon where the fort was to be set up, and carry it out at right angles and at the forward end of the wagon. At the same time John and Tom would take the section on the opposite side of the wagon and carry it around to form the end of the fort.

This would then give Harry and George the opportunity to take the part below the wagon and erect it at the rear angle of the wagon, while Tom and Ralph were getting the posts for the outer ends of the fort.

When all was ready, the signal was given, and the various divisions sprang to their allotted work. They marveled at the celerity with which the fort was put up.

"I see a serious defect in the arrangement at one point," said Tom.

"What is that?" was the question from all.

"You see we have the fort ready, but it is adapted for one side of the wagon only. It may be most important to have it arranged so that either side of the wagon can be used for the fort."

"A fine suggestion," answered John. "That change can be made by having both sides of the body so they can be let down."

George also had a good suggestion to make. "According to the calculations we have fourteen cubic feet of material, and it is light wood, at that. Why couldn't the fort be utilized as a raft, so as to save the cutting of green timber, which is so heavy?"