Once more the bicycle boys pushed on westward, and it must be said that in spite of all their perils they were in the best of spirits. The beautiful valley in Utah was left behind, and some time later found them on the edge of the great American Desert. Water was not to be had, and they began to suffer greatly from thirst. The thirst at last became so great that nearly all were ready to drop from exhaustion. Toots was much affected, and presently he let out a long wail of discouragement.