Wilson and Warren, The Recovery of Jerusalem: A Narrative of Exploration and Discovery in the City and the Holy Land (London: Bentley, 1871); Yigal Shiloh, “The City of David I,” Qedem 19 (1985), pp. 21, 24. Warren even reported the discovery of an iron ring that was situated above the shaft in order to facilitate the lifting of buckets (The Recovery of Jerusalem, pp. 238 and 247–248). Vincent, however, reported that it had disappeared. See L.-H. Vincent, Underground Jerusalem: Discoveries on the Hill of the Ophel (1909–1911) (London: H. Cox, 1911), pp. 15–16.