Some corrections and queries about Variation text. Is pushing hard to finish, but CD is right that the names in the notes make the work interminable. Fears he is causing delay in publication. Is astonished at "the wonderful array of facts brought together and at the manner in which you bring them to bear".

Thanks CD for information on inclined terraces in S. America, which DM thinks applies to the chalk downs of S. England. CD’s definition that the sea widens and fresh water deepens is key to the subject.