Charles Wilson, Ordnance Survey of Jerusalem Made in the Years 1864 to 1865 (Southampton: Ordnance Survey Office, 1866), p. 44; SWP, Jerusalem, p. 220; S. Gibson and D.M. Jacobson, Below the Temple Mount: A Sourcebook on the Cisterns, Subterranean Chambers and Conduits of the Haram al-Sharif (Oxford: Tempus Reparatum, 1996), pp. 33–39.