Our hosts assured us that we should find any further attempt to ascend the river impracticable, and that there was a place where the water fell for a considerable height, but we could only reach it by making a circuit, which would take a day. However, we determined to judge for ourselves, and succeeded in getting about a mile farther, when we found the river shut in by precipices on both sides. It was impossible to descend to it from the brow of the cliff on which we stood, much less to ford it afterwards, or to scramble up the precipice on the other side. There was nothing for it but to make an ascent of at least fifteen hundred feet, either to the high plateau of Jaulan, on the right, or to recross the river where we had already forded it, and scramble up the steep, wooded hillsides of Ajlun until we could find a path leading in the desired direction. This latter course we determined to adopt; so we returned to the Arabs tents, crossed the river more successfully than before, warned by our previous experience, and braced ourselves for a twelve-hundred-feet climb up the best track we could find, under the guidance of one of our recent Arab acquaintances. I had been on the lookout all through the day for ruins, and I was now cheered by the intelligence that I should find some on the summit of the hill we were climbing. Such proved to be the case. The situation, at an elevation by my aneroid of about eleven hundred feet above the sea, would indicate that in old time it was a fortress. It was supplied with water by cisterns, the remains of which still exist, some of them demijohn-shaped, and one about ten feet square and twenty feet to the bottom, which, however, was much filled up. There were many piles of huge blocks of drafted stone, but I did not observe any columns or carving, and I think the remains date from a period anterior to the Roman occupation. The modern name of the place is Tel el-Hösn, but its existence has heretofore been unknown, except to the Arabs of the neighborhood, and its discovery was some compensation to me for the effort I had made to reach it. EXPLORATION ON THE YARMUK.