The tombs stand at a short distance from Cairo, on the edge of the desert. Each has its mosque, with dome and minarets. In one, called El Kait Bey, there is the print of a man's foot on the marble slab. This is said to be the footprint of "the Prophet" Mohammed. It is within a covered enclosure which is open at the sides. The Arabs show their respect for it by touching it reverently with their hands, which they kiss afterwards. [Illustration: THE FINDING OF MOSES.] Another beautiful tomb is El Berbook. It has been faced with red and white stones, many of which are still left. There is an open corridor on the first floor. The entrance-hall leads into the large court of the mosque, in which there once was a fountain. It has long ceased to play, and the ornaments are all in ruin. The dome was richly ornamented. The door to it was locked, and we could only peep through some holes at the beauties within. We next went to the tomb and mosque of Ahd Bey. The pavements, the windows, the grand arch, the ornamentation, all were beautiful. And the thought that the great Mameluke sultans, in whose honour these were wrought, made us silent. These palaces were not for the living, but for the dead. Even Hugh and Lucy grew grave. It was such a solemn thought that we were walking among earthly palaces, dedicated to those to whom earthly glory has for centuries been less than nothing! Here they sleep, silent owners of their silent city in the desert, till the last great trumpet shall sound, and the mighty dead shall (with their humbler fellow-men) be judged according to their works. Thanks be to God who giveth his people the victory in that day, through Jesus Christ our Lord. In silence we passed on from one tomb, one mosque, to another. "Where are we going now?" Hugh asked, after we had ridden on for some time. "To the petrified forest." "Shall we find the trees standing, all turned into stone? For petrified means turned into stone, does it not?" said Lucy. "Yes, it does. But I do not think we shall find any trees standing, from what I have read about the 'petrified wood.'" True enough. When we reached the petrified forest in the Valley of Wanderings (this valley forms the beginning of the desert leading to the Red Sea) we did not see a single tree, but the sand was for miles covered with fragments of wood. Though these were turned into stone, we could see knots and fibres, and even the rough bark, which showed them to be fragments of trees. "Is it not wonderful!" exclaimed Hugh. It was indeed wonderful. And now we came to what looked like the trunk of a large tree; there was another like it, at a little distance; they must have been quite fifty feet long, or more; they lay in the sand, and seemed to have broken as they fell, for there were small pieces scattered about all around. "What made it?" Lucy asked.