1927. The main purpose of this volume is to provide a complete and well documented summary of the whole of the pertinent material upon which a study of Celtic prehistory should be properly based. The author hopes the manner in which this material is presented will show that the salient lesson of this book is that an essential preliminary qualification for the study of druids and druidism is a general knowledge of the racial history and prehistory and social atmosphere of early Gallic and British civilization.