That same night, as keen as ever to get an okapi, the four hunters again sallied out for their previous ambush, determined to make the utmost of the waxing moon that nightly rode the sky; and, upon arriving at the drinking-place, found--to von Schalckenberg's intense disgust--that the carcase of the red buffalo had been so mauled and torn as to render the hide utterly useless. But they had compensation a little later, for during that night they secured no fewer than five handsome leopards that had evidently come down to feast upon the flesh. Nor was this all. Before the night was over, the professor had the satisfaction of shooting a very fine and handsome black-and-white monkey of a hitherto unknown species; while Lethbridge was made happy by the addition to his "bag" of a magnificent white rhinoceros--a creature so rare that many distinguished naturalists had pronounced it extinct. But, to their keen disappointment, no okapi made its appearance at the drinking-place that night. Yet they persevered, lying out night after night, and resting during the day; and at length, on the ninth night after their adventure in pursuit of the original animal, their patience was splendidly rewarded, a pair of okapi making their appearance at the drinking-pool, very late, after all the other animals had come and gone again. There was an exciting and tantalising ten minutes while these animals stood in the full light of the moon and drank, one of them being immediately behind the other, so that it was impossible to shoot both. Then the male, having drunk his fill before his mate had quite finished, wheeled and moved a yard or two. As he did so, the hammers of Lethbridge's and the professor's rifles clicked simultaneously, and a great cheer rang out from the ambushed party as the two animals dropped and lay motionless. Then the four men rose to their feet, and--regardless of the possibility that they might thus be scaring away other desirable specimens--scrambled over the boulders and other obstacles until they stood beside their prey. Then, having admired, to their hearts' content, the singular creatures as they lay, the eager hunters drew their knives, and proceeded to take the skins forthwith, determined to leave nothing to chance and the morning. CHAPTER SIXTEEN. AMONG THE RUINS OF ANCIENT OPHIR.