Nimrud ivories that followed the death of Sargon II in 705 BC or when Nineveh fell and was destroyed in 612 BC. Mallowan's wife was the famous British crime novelist, Agatha Christie (1890–1976), who was fascinated with archaeology, and who accompanied her husband on the Nimrud excavations. Christie helped photograph and preserve many of the ivories found during the excavations, explaining in her autobiography that she cleaned the ivories using a fine knitting needle, an orange stick and a pot of face cream. The collection of ivories uncovered by Mallowan were divided between Iraq and Britain, where they remained at the British
British Museum ancient Near East and its adjacent areas. These cover Mesopotamia, Persia, the Arabian Peninsula, Anatolia, the Caucasus, parts of Central Asia, Syria, the Holy Land and Phoenician settlements in the western Mediterranean from the prehistoric period and include objects from the beginning of Islam in the 7th century. The first significant addition of Mesopotamian objects was from the collection of Claudius James Rich in 1825. The collection was later dramatically enlarged by the excavations of A. H. Layard at the Assyrian sites of Nimrud and Nineveh between 1845 and 1851. At Nimrud, Layard discovered the North-West Palace of Ashurnasirpal II,