Exploration of the Valley of the Kings 16 tombs to the list, and explored several tombs that had already been discovered. During this time Georges Daressy explored KV9. When Gaston Maspero was reappointed to head the Egyptian Antiquities Service, the nature of the exploration of the valley changed again. Maspero appointed Howard Carter as the Chief Inspector of Upper Egypt, and the young man discovered several new tombs, and explored several others, clearing KV42 and KV20. Around the turn of the 20th century, the American Theodore M. Davis had the excavation permit in the valley, and his team (led mostly by Edward R. Ayrton) discovered several royal
Valley of the Kings lecture inside the tombs, and visitors are expected to proceed quietly and in single file through the tombs. This is to minimize time in the tombs and prevent the crowds from damaging the surfaces of the decoration. In 1997, 58 tourists and four Egyptians were massacred at nearby Deir el-Bahri by Islamist militants from Al-Gama'a al-Islamiyya. This led to an overall drop in tourism in the area. On most days of the week an average of 4,000 to 5,000 tourists visit the main valley. The West Valley is much less visited, as there is only one tomb that is open