Zechariah 2:4

and said unto him Rather, and he said unto him; i.e. the interpreting angel said to the second angel whom he met. That he might remain himself near the prophet, whose interpreter he was appointed to be throughout the whole series of visions, he sent his brother angel instead of going himself in pursuit of the man with the measuring line, who by this time had passed on his errand out of the field of view, giving him a message for him in the hearing of the prophet, and so discharging his interpreting function, so far as this vision is concerned.

this young man Some commentators refer this to Zechariah himself, and understand it to be the second angel in Zechariah 2:3, who meeting the interpreting angel bids him run back to the prophet with the announcement that follows. It is difficult, however, to see why on this view the angel should be told to "run;" whereas on the view taken above the messenger is directed to hasten after one who has already started on his errand, and the scenic character of the vision is altogether better maintained.

as towns without walls as open, unwalled country villages. The word is rendered, "unwalled villages," Ezekiel 38:11, and is there explained to be places where men are "at rest and dwell safely, all of them dwelling without walls, and having neither bars nor gates." Comp. Deuteronomy 3:5; Esther 9:19. The prophecy of this and the next verse, however it may include, yet far exceeds the rebuilding of the walls by Nehemiah, or any prosperity and extension into suburbs of Jerusalem, that has yet taken place.