The central valley has already been mentioned several times. It agrees in every respect with the Tyropoeon of Josephus[51], which "distinguished the hill of the upper city from that of the lower, (and) extended as far as Siloam." Many who have written on the topography of ancient Jerusalem, especially Dr Robinson, assert that the Tyropoeon valley ran eastwards from the Jaffa Gate till it joined the central valley, at the point where the latter bends to the south-east, in its course to the Pool of Siloam. In opposition to this opinion, and in confirmation of my own, I have certain facts to bring forward. The valley which I consider the Tyropoeon still drains the whole city; all along it runs a sewer receiving those from the eastern and western divisions. I have had frequent opportunities of ascertaining this, while repairs were being carried on[52]. I found that the central sewer, although 12, 16, and sometimes even 18 feet below the surface, was not based upon rock, but upon made ground. During the repairs I searched for the rock in the upper part of the valley, and found it at a depth of 18 feet, near the Damascus Gate, of 26 feet near the Temple Bazaar, of 22 feet at a few paces to the north of the Dung Gate. These facts shew that there was formerly a valley in this part of Jerusalem. Now we cannot adopt the position assigned to the Tyropoeon by Dr Robinson, for the following reasons: (1) In the north ditch of the Castle of David we find the rock, which extends thence in a north-west direction. I came upon it in 1860, when a building (now used as a custom-house) was erected by the Greek convent outside the wall adjoining the Jaffa Gate. (2) The rock, found under the new buildings belonging to the Latin Patriarch a little to the north of the castle, under the English church and under a new building to the north of it, plainly shews that the head of the valley could not be at this spot. On the south side of the Christian Bazaar is the Greek Convent of S. John, and a few paces to the south of this the Prussian hospital. While this was being built in 1858, I examined its foundations, and ascertained the shelving stratum on which they rest to be a continuation of the rock beneath the convent. Where then could the valley be? (3) A similar state of things is found on descending about 350 feet to the east. (4) From west to east along the course of the supposed valley runs a sewer, 6 feet below the ground, cut in some parts in the rock. This I helped to repair at several points in 1856, and was able to ascertain that there was but very little made ground anywhere near it; I cannot therefore allow that there ever was a valley at this place. Brocardus about A.D. 1283, Adrichomius and Villalpandus near the close of the sixteenth century, assert that this valley existed, but to prove their statement they ought to have made excavations. They must have seen Jerusalem in a condition very like its present, especially as