In 1960 Louis, his son Philip and Ray Pickering discovered a fossil he termed "Chellean Man", as it was in context with Oldowan tools, the first such find. After reconstruction Louis and Mary called it "Pinhead." It was subsequently included with "Homo erectus" and was in fact contemporaneous with "Paranthropus", which on that account cannot have been in the human line. For many years Louis believed erectus was the user of the tools and "Australopithecus" was not.