As many writers make the northern part of the first wall to have run from the Jaffa Gate eastward, Captain Warren spent some time in excavating in the Muristan, a large open space in the city, the old burial-place of the Knights Hospitallers; but he found 'nothing but confusion in the shape of old walls running at one another in all directions.' At Wilson's arch, however, near the Haram wall, and nearly due east from the Jaffa Gate, he discovered an old city gateway at a great depth. If we could find traces of the tower Hippicus we should come upon the first and third walls together, and similarly the gate Gennath would put us on the line of the first and second walls. The theories of some writers compel them to put Hippicus at the Jaffa Gate, where they think they see its representative in the present Castle of David. But we agree with Mr. Fergusson, that the remains called _Kasr Jalud_ at the north-west corner of the city suit better with Josephus's description. To this point Captain Warren has not yet been able to give much attention; but the so-called Gennath Gate was examined both by Wilson and by Warren, and pronounced by the former to be of comparatively modern construction, by the latter to be ancient, 'especially as its style is Roman.' The gate rests in made earth. The Damascus Gate is built of two very different styles of masonry, one of them apparently very old; and it suits the views of several writers, who differ as to the course of the first wall, that this gate and the portion of wall immediately east of it should be part of the second wall of the city.[28] At the Damascus Gate excavation brought to light 'a very ancient wall ten feet six inches in thickness, built with bevelled stones similar to those of the Jews' Wailing Place;' but the wall would seem to be built out of old materials, since stones of more recent date were found among them; and at the foot of the wall lay a stone with a Templar's cross on it. The third wall has probably almost or quite disappeared, for when Hadrian was re-erecting the walls in A.D., 136, he would not think it necessary to go out so far; the population had diminished, and to construct armour without, so disproportionate to the shrunken body within, would have been simply ridiculous. If any part of the third wall remained, we might suppose it to be at the northern part of the present east wall; but here excavation shows that there has been 'no destruction of extensive buildings so far north as St. Stephen's Gate,' that the wall itself is 'of no very ancient date,' and that 'of the city wall to the east, the north-east angle of the Haram area is the first sign from the northern end of anything ancient in appearance.' Perhaps there is here a little room for error; for where the rock is high, the absence of much _débris_ may not imply that there has been no great destruction of buildings; but simply that the rubbish has found its way to the valleys or was not suffered to accumulate.