In a letter to this Magazine of May, 1895, headed “The Indentation of the Bunter Pebbles,” Mr. W. S. Gresley criticizes the summing-up of my views, given in the ‘Annals of British Geology’ (1892, p. 52), that “The indentation of the pebbles he considers to be the result of contact-solution, the water being retained at these spots by capillary attraction.” It would have been more satisfactory if Mr. Gresley could have read my original paper before penning his letter, as he would then not have assumed that I “adduce no evidence in support of the chemical theory.”