door. entrance.
behold. Figure of speech Asterismos. App-6.
came down. were coming down. Compare Joel 3:18. and see Isaiah 12:3; Isaiah 44:3.Zechariah 14:8; Revelation 22:1.
from under. from beneath. Referring to the perennial source which has supplied the fountain of Gihon. See App-68.
right side: i.e. the south side. Compare Ezekiel 47:2.