1 JANUARY 1927, Page 25

OUR EARLY ANCESTORS. By M. C. Burkitt. (Cam- bridge University

Press. 7s. 6d. net.)—Mr. Burkitt, who ranks among the ablest of our younger prehistorians, has now produced a concise and useful introduction to the study of the Mesolithic, Neolithic and Copper Ages. By " Mesolithic " is meant the transition period between the Old Stone Age and the New Stone Age—a period best known from the shellmounds on the Baltic coast and from caves in Yorkshire, France and Spain. The Copper Age preceded that great epoch in man's development which was heralded by the invention of bronze. Mr. Burkitt refers to recent finds, including those of the American expedition in the Gobi desert. As the study of early man has been much hampered by the use of an excessive variety of names for different types of cultures, this lucid and workmanlike textbook is welcome. It is suitably illustrated and each chapter has a list of authorities.