Valley of the Kings Baillet has located over 2,100 Greek and Latin instances of graffiti, along with a smaller number in Phoenician, Cypriot, Lycian, Coptic, and other languages. The majority of the ancient graffiti is found in KV9, which contains just under a thousand of them. The earliest positively dated graffiti dates to 278 B.C. In 1799, members of Napoleon's expedition to Egypt (especially Dominique Vivant) drew maps and plans of the known tombs, and for the first time noted the Western Valley (where Prosper Jollois and Édouard de Villiers du Terrage located the tomb of Amenhotep III, WV22). The "Description de l'Égypte" contains
Valley of the Kings Ramesses II returned to an early style, with a bent axis, probably due to the quality of the rock being excavated (following the Esna shale). Between 1998 and 2002 the Amarna Royal Tombs Project investigated the valley floor using ground-penetrating radar and found that, below the modern surface, the Valley's cliffs descend beneath the scree in a series of abrupt, natural "shelves", arranged one below the other, descending several metres down to the bedrock in the valley floor. The area of the Theban hills is subject to infrequent violent thunderstorms, causing flash floods in the valley. Recent studies have shown