Comments on CD’s observations on his address; clarifies his view of the importance of isolation, the effect of climate, the plants of S. Africa and Australia.

The 5th edition of Origin was printed some months previously and stereotypes cannot be supplied.

If Appletons will reprint the 5th edition of Origin in America, he pledges to supply stereotypes, if possible, or the sheets as printed if not, of his new book (Descent).

Has seen J. J. Sylvester again.