These caves had been rediscovered only in 1119 CE by a monk named Arnoul, after an unnamed monk at prayer "noticed a draught" in the area near the present location of the mihrab and, with other "brethren", removed the flagstones and found a room lined with Herodian masonry. Arnoul, still searching for the source of the draught, hammered on the cave walls until he heard a hollow sound, pulled down the masonry in that area, and discovered a narrow passage. The narrow passage, which subsequently became known as the "serdab" (Arabic for "passage"), was similarly lined with masonry, but partly blocked up. Having unblocked the passage, Arnoul discovered a large round room with plastered walls. In the floor of the room, he found a square stone slightly different from the others and, upon removing it, found the first of the caves. The caves were filled with dust. After removing the dust, Arnoul found bones; believing the bones to be those of the biblical Patriarchs, Arnoul washed them in wine and stacked them neatly. Arnoul carved inscriptions on the cave walls describing whose bones he believed them to be. passage to the caves was sealed at some time after Saladin had recaptured the area, though the roof of the circular room was pierced, and a decorative grate was placed over it. In 1967, after the Six-Day War, the area fell into the hands of the Israel Defense Forces, and Moshe Dayan, the Defence Minister, who was an amateur archaeologist, attempted to regain access to the tombs. Ignorant of the "serdab" entrance, Dayan concentrated his attention on the shaft visible below the decorative grate and had the idea of sending someone thin enough to fit through the shaft and down into the chamber below. Dayan eventually found a slim 12-year-old girl named Michal to assist and sent her into the chamber with a camera.