THERE are few parts of the British Isles which can rival the southern Highlands oi Scotland for beauty and variety of scenery. Over much of this district the genius of Scott has thrown the glamour of romance, and year after year crowds of tourists visit the scenes which he has rendered famous. The flat vales which lie to the south of the mountains (the plain of Strathmore) afford an excellent contrast to the bolder hill country behind them. Even the most stolid traveller who enters this region may be expected to feel some curiosity regarding the origin of the scenery and the history of the rocks which meet his eyes. Not a little has been written on this subject, but much of it is contained in scientific memoirs and periodicals which are beyond the grasp of the untrained geologist. The country, especially the Highland portion of it, is of great complexity, and its structure has given rise to discussions, many of which are far from settled at the present time. The task which the author of this work has essayed is one of considerable difficulty. He aims at giving an account of the geology and physiographical development of this intricate region which shall be intelligible to the unscientific and at the same time thoroughly abreast of the most recent researches. He has achieved a large measure of success even in the most difficult part, while some of his chapters, such as those on glaciation and scenery, are excellent. The result is a book which is at once interesting to the layman and useful to the professed geologist.