20. pool and a conduit—(See on 2Ch 32:30).

     2-8. when Hezekiah saw that Sennacherib . . . was purposed to fight against Jerusalem—An account of the means taken to fortify Jerusalem against the threatened siege is given only in this passage. The polluting or filling up of wells, and the altering of the course of rivers, is an old practice that still obtains in the wars of the East. Hezekiah's plan was to cover the fountain heads, so that they might not be discovered by the enemy, and to carry the water by subterranean channels or pipes into the city—a plan which, while it would secure a constant supply to the inhabitants, would distress the besiegers, as the country all around Jerusalem was very destitute of water.

     4. So there was gathered much people . . . who stopped all the fountains, and the brook that ran through the midst of the land—"Where these various fountains were, we have now no positive means of ascertaining; though En-rogel, and the spring now called the Virgin's Fount, may well be numbered among them. JOSEPHUS mentions the existence of various fountains without the city, but does not mention any of them in this connection but Siloam. 'The brook,' however, is located with sufficient precision to enable us to trace it very definitely. We are told that it 'ran through the midst of the land.' Now a stream running through either the Kedron or Hinnom Valley, could, in no proper sense, be said to run through the midst of the land, but one flowing through the true Gihon valley, and separating Akra and Zion from Bezetha, Moriah, and Ophel, as a stream once, doubtless, did, could, with peculiar propriety, be said to run through the midst of the land on which the [Holy] City was built. And that this is the correct meaning of the phrase is not only apparent from the force of circumstances, but is positively so declared in the Septuagint, where, moreover, it is called a 'river,' which, at least, implies a much larger stream than the Kedron, and comports well with the marginal reading, where it is said to overflow through the midst of the land. Previous to the interference of man, there was, no doubt, a very copious stream that gushed forth in the upper portion of that shallow, basin-like concavity north of Damascus Gate, which is unquestionably the upper extremity of the Gihon valley, and pursuing its meandering course through this valley, entered the Tyrop on at its great southern curve, down which it flowed into the valley of the Kedron" [BARCLAY, City of the Great King].

     5, 6. he strengthened himself—He made a careful inspection of the city defenses for the purpose of repairing breaches in the wall here, renewing the masonry there, raising projecting machines to the towers, and especially fortifying the lower portion of Zion, that is, Millo, "(in) the original city of David." "In" is a supplement of our translators, and the text reads better without it, for it was not the whole city that was repaired, but only the lower portion of Zion, or the original "city of David."

     30. stopped the . . . watercourse of Gihon, and brought it . . . to the west side of the city, &c.—(Compare 2Ki 20:20). Particular notice is here taken of the aqueduct, as among the greatest of Hezekiah's works. "In exploring the subterranean channel conveying the water from Virgin's Fount to Siloam, I discovered a similar channel entering from the north, a few yards from its commencement; and on tracing it up near the Mugrabin gate, where it became so choked with rubbish that it could be traversed no farther, I there found it turn to the west in the direction of the south end of the cleft, or saddle, of Zion, and if this channel was not constructed for the purpose of conveying the waters of Hezekiah's aqueduct, I am unable to suggest any purpose to which it could have been applied. Perhaps the reason why it was not brought down on the Zion side, was that Zion was already well-watered in its lower portion by the Great Pool, 'the lower pool of Gihon.' And accordingly WILLIAMS [Holy City] renders this passage, 'He stopped the upper outflow of the waters of Gihon, and led them down westward to the city'" [BARCLAY, City of the Great King]. The construction of this aqueduct required not only masonic but engineering skill; for the passage was bored through a continuous mass of rock. Hezekiah's pool or reservoir made to receive the water within the northwest part of the city still remains. It is an oblong quadrangular tank, two hundred forty feet in length, from one hundred forty-four to one hundred fifty in breadth, but, from recent excavations, appears to have extended somewhat farther towards the north.

     3. Go forth—out of the city, to the place where Ahaz was superintending the works for defense and the cutting off of the water supply from the enemy, and securing it to the city. So Isa 22:9; 2Ch 32:4.