The remainder of Broom's career was devoted to the exploration of these sites and the interpretation of the many early hominid remains discovered there. For his volume, "The South Africa fossil ape-men, the Australopithecinae", in which he proposed the Australopithecinae subfamily, Broom was awarded the Daniel Giraud Elliot Medal from the National Academy of Sciences in 1946. He continued to write to the very last. Shortly before his death he finished a monograph on the Australopithecines and remarked to his nephew:<br>