Allan had heard of Private Thomas Keith, of the 72nd Highlanders, who, after being taken prisoner in Egypt in 1807, rose to the rank of Aga of the Mamelukes and Governor of Medina; but the prospects of promotion in the desert, held out to him by Zeid, did not prove very attractive; and here we may mention that the name of Zeid is of great antiquity, for it was that of the adopted son of Mohammed, whom he placed on the Black Stone of the Caaba, and to whom he gave a wife named Zinab. Zeid's wife had already suggested that Allan should have his head shaved, and that a turban or tarboosh should be substituted for his tropical helmet, with its red 42nd hackle; so he began to think that something must be done to put an end to this life of idleness and annoyance. At times he thought he would affect to fall into the views of Zeid-el-Ourdeh; get the blood mare and put a burnous over his regimental jacket and kilt, and--leaving the 'Bedouin girl' out of the category--take an opportunity of trying the speed of the said mare, and escaping. But the time for departing further into the desert drew near, and no mare was given him; he had, however, the offer of a camel, but that would not do at all. He thought of the distress his disappearance must cause his family--if deemed dead, their sorrow; and ere long the deletion of his name from the army list, and from his position in what he deemed a family regiment, and the whole complication of the situation maddened him. In that Bedouin band were hundreds of dusky robbers with whom he had not eaten the mystic bread and salt of the East, and who owed him neither favour nor protection; and thus the grotesque views and oppressive friendship of Zeid might fail to secure his life at their hands. He knew that they would think no more of killing him than of killing a kid, and he recalled with sufficient disgust the swift catastrophe of the wretched Holcroft. When rambling on the skirts of the black tented camp, under close surveillance, however, Allan observed that the tomb of the Santon had a remarkably broad and peculiar cornice round its dome, that it was curved upward like the rim of a billycock hat, and that a vine tendril of considerable strength had ascended, in the lapse of years, from the base to the summit of the dome; and thus he conceived, if he could ascend thereinto unseen, he might lie _en perdue_, till the tribe departed, and then he should be safe. The day before the tents were to be struck, Zeid ordered some food to be procured by his huntsmen, who--though the food of the tribe was generally farinaceous--succeeded in capturing some of these gazelles that live in the open plain, where they browse upon the saline and pungent herbage.