It is stated[149] that "the third wall had ninety towers (twenty cubits square), and the spaces between them were each two hundred cubits, but in the middle wall were fourteen towers[150], and the old wall was divided by sixty; while the whole compass of the city was thirty-three stadia." Now it is quite credible that the middle and old walls had the above numbers of towers, but it is very hard to understand how the third could have had ninety, and these two hundred cubits apart. If each tower was twenty cubits square, then the space occupied by towers would be eighteen hundred cubits; and if they were two hundred cubits apart, the sum of their distances would be eighteen thousand cubits; so that the whole length of the third wall would have been nineteen thousand eight hundred cubits; which is equal to about nine thousand seven hundred and ninety-one yards, or _forty-eight stadia_. This, besides being greater than the whole compass of the city (thirty-three stadia), is far too large for even the space claimed by Barclay; because in order to obtain a measurement of this extent, we must suppose a part of the Scopus itself to have been included within the walls. There must therefore, as it appears to me, be some error in the text of Josephus in the number 'ninety,' so that no argument can be founded upon it. The position, however, which I assign to the wall, agrees very well with the thirty-three stadia, given by the historian as the whole length of the walls[151]. My theory is also supported by the description of Titus' wall of circumvallation[152]. "He began the wall from the _Camp of the Assyrians_, where his own camp was pitched; and drew it down to the lower parts of the New City; thence it went along the valley of the Kidron to the Mount of Olives; it then bent towards the south, and encompassed the mountain as far as the rock called _Peristereon_, and that other hill which lies next it; and is over against the valley which reaches to Siloam; whence it tended again to the west, and went down to the valley of the fountain, beyond which it went up again at the _Monument of Ananus_ the high priest; and encompassing that mountain where Pompeius had formerly pitched his camp, it returned back to the north side of the city, and was carried on as far as a certain village called the _House of the Erebinthi_, after which it encompassed _Herod's Monument_, and there on the east was joined to Titus' own camp, where it began. Now, the length of this wall was thirty-nine stadia. Now, at this wall without were erected thirteen places to keep garrison in, whose circumferences put together amounted to ten stadia." Of the places mentioned in the above description, the camp of the Assyrians is at the north-west corner of the present line of walls, two stadia distant from which were the head-quarters of Titus[153].