Flavius Josephus, The Wars of the Jews
William Whiston, A.M., Ed.

[502] These arguments prevailed with the commanders. So Titus gave orders that the army should be distributed to their several shares of this work; and indeed there now came upon the soldiers a certain divine fury, so that they did not only part the whole wall that was to be built among them, nor did only one legion strive with another, but the lesser divisions of the army did the same; insomuch that each soldier was ambitious to please his decurion, each decurion his centurion, each centurion his tribune, and the ambition of the tribunes was to please their superior commanders, while Caesar himself took notice of and rewarded the like contention in those commanders; for he went round about the works many times every day, and took a view of what was done. Titus began the wall from the camp of the Assyrians, where his own camp was pitched, and drew it down to the lower parts of Cenopolis; thence it went along the valley of Cedron, 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 the valley which reaches to Siloam; whence it bended 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 Pompey 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's own camp, where it began. Now the length of this wall was forty furlongs, one only abated. Now at this wall without were erected thirteen places to keep garrison in, whose circumferences, put together, amounted to ten furlongs; the whole was completed in three days; so that what would naturally have required some months was done in so short an interval as is incredible. When Titus had therefore encompassed the city with this wall, and put garrisons into proper places, be went round the wall, at the first watch of the night, and observed how the guard was kept; the second watch he allotted to Alexander; the commanders of legions took the third watch. They also cast lots among themselves who should be upon the watch in the night time, and who should go all night long round the spaces that were interposed between the garrisons.