From fragments found at Khorsabad, M. Place had already divined that the Assyrians covered the planks of their doors with bronze plates, but all doubts on the point have been removed by a recent discovery, which has proved once for all that art profited in the end by what at first was nothing more than a protection against weather and other causes of deterioration. In 1878 Mr. Hormuzd Rassam, the fellow traveller of Sir Henry Layard, found in the course of his excavations in Assyria for the British Museum, some metallic bands covered with _repousse_ reliefs and bearing the name of Shalmaneser III. (895-825). The site of this discovery was Balawat, an artificial mound about fifteen miles to the east of Mossoul.[303] As soon as these bands had been examined in London by competent archaeologists, they were recognized as having belonged to the leaves of a wooden door, which must have been nearly twenty-seven feet high and about three inches thick. This latter dimension has been deduced from the length of the nails used to keep the bands in place. At one end these bands were bent with the hammer round the pivot to which each half of the door was attached. These pivots, judging from the bronze feet into which they were "stepped," were about twelve inches in diameter. It is easy to see from their shape how these feet were fixed and how they did their work (Fig. 97). The point of the cone was let into a hollow socket prepared for it in a block cut from the hardest stone that could be found. Such a material would resist friction better and take a higher polish than brick, so that it was at once more durable and less holding. Sockets of flint, basalt, trachyte, and other volcanic rocks have been found in great numbers both in Assyria and Chaldaea.[304] Instances of the use of brick in this situation are not wanting,[305] however, and now and then the greenish marks left by the prolonged contact of metal have been discovered in the hollows of these sockets.[306] [Illustration: FIG. 97.--Bronze foot from the Balawat gates and its socket.[307] British Museum.] More than one method was in use for fixing the pivots of the doors and enabling them to turn easily. Sir Henry Layard brought from Nimroud four heavy bronze rings which must have been used to supplement these hollow sockets.[308] In one way or another bronze occupied a very important place in the door architecture of the Assyrians. In those cases where it neither supplied the door-case nor ornamented its leaves, it was at least used to fix the latter and to enable them to turn.