Dirrag, wondering vaguely if his young master knew how to handle his weapons, unsheathed his own blade and, squatting at the edge of the pool, impaled the green twigs, one after another, upon its point and drew them from the water. When all had been thus removed he buried the deadly branches deep in the desert sands, and then reclined beside his master. The horses sniffed eagerly at the pool, but would not drink until they were given permission. Silence fell upon the group. When three hours had passed Dirrag arose, crept to the pool and dipped his finger in the water, tasting a drop warily. Then he leaned over and drank, somewhat sparingly, and laid himself down again, commending his soul to Allah. In another hour he sprang up, alert and brisk, and touched Ahmed’s shoulder. “You may drink, master,” said he. “The pool is cleansed.” Five minutes later, men and horses alike refreshed, they galloped away through the moonlight. The fifth day dawned--the fifth according to Dirrag’s calendar, which dated from the moment he had left Mekran. Ahmed had been in the saddle thirty-six hours, with brief periods of rest. Dirrag, man of iron though he was, began to show signs of fatigue. He was used to long riding, but now his eyelashes seemed lead and every stroke of his horse’s hoofs sounded in his ears like the beat of a drum. Soon after the sun arose they discovered a group of horsemen far across the desert, who seemed to be riding in the same direction they were. The horsemen were mere specks upon the sands, at first, but as the hours passed they grew larger. “Travellers to Mekran,” remarked Dirrag, calmly. “The sirdars have been assembled. Doubtless it is the party of some dignitary journeying to the death-bed of Burah Khan.” “How far distant is Mekran?” asked Ahmed.