If the Tyropoeon valley extended from Damascus Gate southward, and the city of David was on the eastern side of it, north of the temple, then the water which Hezekiah diverted from its course, and brought down to the west side of the city of David (2 Chron. xxxii. 30), and yet _into_ the city of Jerusalem (2 Kings xx. 20) was probably brought in at Damascus Gate, and ran towards the Kedron, either on the west side of the temple, or by the Maccabean valley, on the northern side. In the southern half of the Tyropoeon valley, outside the west wall of the Haram, Captain Warren has found, at a depth of seventy or eighty feet, a rock-cut aqueduct, twelve feet deep and six feet wide, with round rock-cut pools at intervals, and shafts which indicate that pure water was drawn from it. As Hezekiah brought the stream down from 'the upper watercourse of Gihon,' this discovery has a direct bearing on the question of the position of 'the upper pool,' and of 'Gihon, in the valley,'where Solomon was anointed king; but as the upper part of the Tyropoeon has not been excavated, it remains uncertain whether the water came in by Damascus Gate or Jaffa Gate, and consequently what position of Zion is favoured by the finding of this aqueduct. The search for the old walls of the city has only been partially carried out. Here, again, we have Josephus's explicit description, and the usual differences among the commentators. 'The city of Jerusalem was fortified with three walls, on such parts as were not encompassed with unpassable valleys; for in such places it had but one wall.... The old wall began on the north at the tower called Hippicus, and extended as far as the Xistus, a place so called, and then, joining to the Council-house, ended at the west cloister of the temple. But if we go the other way westward, it began at the same place, and extended through a place called Bethso to the Gate of the Essenes; and after that it went southward, having its bending above the fountain Siloam, where it also bends again towards the east at Solomon's pool, and reaches as far as a certain place which they called Ophlas, were it was joined to the eastern cloister of the temple. The second wall took its beginning from that gate which they call Gennath, which belonged to the first wall; it only encompassed the northern quarter of the city, and reached as far as the tower Antonia. The beginning of the third wall was at the tower Hippicus, whence it readied as far as the north quarter of the city, and the tower Psephinus, and then was so far extended till it came over against the monuments of Helena (which Helena was Queen of Adiabene, the daughter of Izates); it then extended farther to a great length, and passed by the sepulchral caverns of the kings, and bent again at the tower of the corner, at the monument which is called the monument of the Fuller, and joined to the old wall at the ravine called Kedron.'[27]