In several of the temples in the Theban area and—Dr. Reisner informs me—in the temple of the third pyramid at Gizeh, one may see large blocks, undercut at various points along their length as if to take the point of a lever. {38} Rollers, too they must have known, even if they did not get the idea from the Assyrians. We know that they used sleds running on sleepers—at Lahun pyramid the tracks have actually been found—and it is incredible that the greater ease in pulling, when a small sled ran over a stick, should escape their notice. It might be asked why the statue of Dḥutḥotpe was _not_ pulled along on rollers, instead of on a sled only (cf. section 29). The reason seems to be that, given a moderate sized block and plenty of men, the progress would be quicker, as the sled does not need the constant adjustment and attention which is required by rollers. As we have already remarked, the friction renders the use of sleds alone impossible for a large obelisk (cf. section 31), so, since it appears that obelisks must have been brought into the temple precincts endways, there is no other means we know of other than rollers. Several pieces of wood, which were probably used as rollers, were found in the débris round the Lahûn Pyramid, and are published in BRUNTON, _Lahun I, the Treasure_, plate XX. They vary from a foot to about 8 inches in length, having diameters from 2 to 3 inches. The ends of all the examples are rounded. It is strange that, in the quarry and chip-heap cleared at El-Lahûn, so few workmen’s tools were found with the exception of wooden mallets and sleepers. Dr. G. A. Reisner, in reply to my question as to whether any rollers had been found in the course of his excavations, has kindly sent me the following note. “At Nuri (Ethiopia) we found two short thick granite rollers in the chamber of Pyramid VIII, where there was a granite coffin, weighing 7–8 tons, which may have been used for moving the coffin from the foot of the stairs through rooms A and B to its place in C. We actually used these rollers in moving the coffin out.” He gives the date of these rollers as about 550 B. C. (39) On the other hand, it appears that the capstan and the block and tackle, arranged to give a large mechanical advantage, were quite unknown until quite late times. No trace has been found of them in the town-sites excavated in recent years, nor is there any trace of their derivatives, such as the spoked well-drum in one case or the application of the other for hauling up the sails of ships. In the scene of the expedition to Punt in the time of Ḥatshepsôwet, an examination of the sail halliards reveal nothing in the nature of a block and tackle.