The Middle Paleolithic in the modern sense made its appearance in 1911 in the 1st edition of William Johnson Sollas' "Ancient Hunters". It had been used in varying senses before then. Sollas associates the period with the Mousterian technology and the relevant modern people with the Tasmanians. In the 2nd edition of 1915 he has changed his mind for reasons that are not clear. The Mousterian has been moved to the Lower Paleolithic and the people changed to the Australian aborigines; furthermore, the association has been made with Neanderthals and the Levalloisian added. Sollas says wistfully that they are in "the very middle of the Palaeolithic epoch." Whatever his reasons, the public would have none of it. From 1911 on, Mousterian was Middle Paleolithic, except for holdouts. Alfred L. Kroeber in 1920, "Three essays on the antiquity and races of man," reverting to Lower Paleolithic, explains that he is following Louis Laurent Gabriel de Mortillet. The English-speaking public remained with Middle Paleolithic.