It was still only by crawling that Richard Lepsius was able to reach the end of the tomb in 1844–1845, exploring the accessible rooms and planning the underground complex, the walls of which, he noted, had been badly damaged by silt and gravel. Lepsius not only provided the first precise plan of the tomb but also guessed the existence, to the east of the pillared chamber (F), of two rooms which are still inaccessible. Only much later was Lepsius' plan revised by the team of the Theban Mapping Project of the University of Berkeley.
