Rab-shakeh - In 2Ki 18:17, Tartan and Rab-saris are joined with him. Rab-shakeh was probably the chief leader; Rab is a title of authority, “chief-cup-bearer.”
Lachish - a frontier town southwest of Jerusalem, in Judah; represented as a great fortified city in a hilly and fruitful country in the Koyunjik bas-reliefs, now in the British Museum; also, its name is found on a slab over a figure of Sennacherib on his throne.
upper pool - the side on which the Assyrians would approach Jerusalem coming from the southwest (see on Isa 7:3).