In the Geological Magazine for May appeared an article by Dr. R. H. Rastall entitled “On the Tectonics of the Southern Midlands”, which I feel it absolutely necessary to criticize and correct in so far as it deals with evidence derived from Northamptonshire and quotations from my own papers, the latter in parts verbally accurate and yet altogether misleading as used; and I trust Dr. Rastall will accept the following corrections and additions rather as a contribution than an adverse criticism merely to his theory of “the recurrence of activity along old-established fold-lines of an early date–5, and will be separately referred to.