2 Chronicles 33:14

14. he built a wall without the city . . . on the west side of Gihon . . . even to the entering in at the fish gate—"The well-ascertained position of the fish gate, shows that the valley of Gihon could be no other than that leading northwest of Damascus gate, and gently descending southward, uniting with the Tyropoeligon at the northeast corner of Mount Zion, where the latter turns at right angles and runs towards Siloam. The wall thus built by Manasseh on the west side of the valley of Gihon, would extend from the vicinity of the northeast corner of the wall of Zion in a northerly direction, until it crossed over the valley to form a junction with the outer wall at the trench of Antonia, precisely in the quarter where the temple would be most easily assailed" [BARCLAY].