Howard Carter's map charts Lord Carnarvon's concession in the eastern part of the Valley of the Kings in Thebes, located on the east side of the Nile, opposite Luxor. Carter drew and updated the map during their excavations in the Valley between 1917 and 1922. Over a pencilled grid of referenced squares, he plotted in ink the plans of the known royal tombs and other features while highlighting geological features and landmarks in yellow. He updated it as he methodically worked along the valley floor, excavating down to the bedrock. Carter later claimed that, in the summer of 1922, after five years of work in the Valley, the Earl's enthusiasm for continuing the excavations began to wane due to the expense and the small number of finds. This map supported Carter's argument for one more season, during which he would clear the few remaining map squares below the tomb of Ramesses VI. The entrance of Tutankhamun's tomb lay concealed below the ancient workers' huts marked on the map [L and M, 15 and 16]. At the beginning of the 1922–1923 season, after the Egyptian workers removed these huts and valley floor detritus, they revealed the tomb's first steps on 4 November 1922.