directions were lacking. The captain led the caravan in a zigzag way, hoping that he might chance upon some trace, some extinct fire, or a tree with a sign carved on the bark. In this manner they advanced for a few days. Unfortunately they entered afterwards upon a plain, entirely treeless, covered with high heather and tufts of dried grass. Uneasiness began to possess both friends. How easy it was to miss each other in that immeasurable expanse, even with a whole caravan; and how much more so two children, who, as they imagined, crept like two little worms somewhere amid heather higher than themselves! Another day passed. Neither fires at night nor tin boxes, with notes in them, fastened on the tufts helped them any. The captain and the doctor at times began to lose hope of ever succeeding in finding the children and, particularly, of finding them alive.
They sought for them zealously, however, during the following days. The patrols, which Glenn sent right and left, finally reported to him that farther on began a desert entirely waterless; so when they accidentally discovered cool water in a cleft it was necessary to halt in order to replenish their supplies for the further journey.
The cleft was rather a fissure, a score of yards deep and comparatively narrow. At its bottom flowed a warm spring, seething like boiling water, for it was saturated with carbonic acid. Nevertheless, it appeared that the water, after cooling, was good and wholesome. The spring was so abundant that the three hundred men of the caravan could not exhaust it. On the contrary the more water they drew from it the more it flowed, and filled the fissure higher.
"Perhaps sometime," Doctor Clary said, "this place will be a resort for the health-seeker, but at present this
