Before I went to Malaya in 1903 I had worked for two field seasons in Cornwall as a very junior member of the staff of the Geological Survey, and since my retirement in 1931 the old interests in Cornwall have attracted me, with the result that from 1935 onwards I have been doing field-work each year in the Lizard Peninsula. My original object in going to this part of Cornwall, armed with the 1912 Geological Survey Memoir (The Geology of the Lizard and Meneage, J. S. Flett and J. B. Hill) and the two 1-in. maps dated 1912 and 1934, was humbly to follow the work of my seniors in a part of Cornwall to which I had not previously penetrated, without any idea of criticism; but, although anyone who is conversant with the geology of the Lizard must agree with by far the greater part of the 1912 Memoir, in the course of my very enjoyable trips, during which I had the advantage of discussions with Sir John Flett and Dr. E. M. L. Hendriks, points have cropped up that are new or present problems on which I cannot see eye to eye with the surviving author of the Memoir, who has suggested that I should publish my results before he produces a new edition.