Even as Childe was developing this revolution theme the ground was sinking under him. Lubbock did not find any pottery associated with the Paleolithic, asserting of its to him last period, the Reindeer, "no fragments of metal or pottery have yet been found." He did not generalize but others did not hesitate to do so. The next year, 1866, Dawkins proclaimed of Neolithic people that "these invented the use of pottery..." From then until the 1930s pottery was considered a sine qua non of the Neolithic. The term Pre-Pottery Age came into use in the late 19th century but it meant Paleolithic.