In Mr. Geikie's admirable work on “Prehistoric Europe,” in the chapter “On British Post-Glacial and Recent Deposits,” he alludes more than once in very flattering terms to my share in elucidating Cornish Post-Tertiary Geology, at the same time, however, questioning certain conclusions attributed to me with reference to the general correlation of the Forest-beds in stream-sections, i.e. those resting on the tin ground, with the Forests “exposed upon the present foreshore.”