Green or soaked hides are cut into the proper shape to fit the frame, and sewed together with buckskin strings; then the frame of the boat is placed in the middle, the hide drawn up snug around the sides, and secured with raw-hide thongs to the gunwale. The boat is then turned bottom upward and left to dry, after which the seams where they have been sewed are covered with a mixture of melted tallow and pitch: the craft is now ready for launching.

A boat of this kind is very light and serviceable, but after a while becomes water-soaked, and should always be turned bottom upward to dry whenever it is not in the water. Two men can easily build a bull-boat of three hides in two days which will carry ten men with perfect safety.

A small party traveling with a pack train and arriving upon the banks of a deep stream will not always have the time to stop or the means to make any of the boats that have been described. Should their luggage be such as to become seriously injured by a wetting, and there be an India-rubber or gutta-percha cloth disposable, or if even a green beef or buffalo hide can be procured, it may be spread out upon the ground, and the articles of baggage placed in the centre, in a square or rectangular form; the ends and sides are then brought up so as entirely to envelop the package, and the whole secured with ropes or raw hide. It is then placed in the water with a rope attached to one end, and towed across by men in the same manner as the boats before described. If hides be used they will require greasing occasionally, to prevent their becoming water-soaked.