Although the Siloam Channel carried water to the southern part of the city (and the royal gardens), the water could also be siphoned off by a separate short tunnel (called Tunnel III in Louis-Hugues Vincent’s numbering) that connected the Siloam Channel to the pool adjacent to the Gihon Spring. That pool was protected by the so-called Pool Tower that Reich and Shukron have discovered and, presumably, by another similar tower on the other side of the pool. Incidentally, Vincent designated Hezekiah’s Tunnel as Channel I and the Siloam Channel as II.