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45 DARWIN (CHARLES, 1809-1882). Naturalist and Author.

AUTOGRAPH LETTER SIGNED.

2 pp., 8vo. Kent, 18th February, N.Y. £5 5s

[To B. J. Sulivan   18 February [1868]]

"…Thanks for curious case about the stallions & your mentioning this makes me ask, on the bare though improbable chance of your having observed horses fighting or seen marks of old wounds, whether they especially try to bite each other's necks? Do you know anything about male seals fighting together? Do not of course answer unless you happen, by an odd chance to have any such knowledge."

460 DARWIN (CHARLES). AUTOGRAPH LETTER SIGNED. 4 pp., 8vo. London, 16th August, 1839. £5 5s

Giving his opinion of a book on geology which he considers will never be esteemed by really scientific men.

[To William Schoberl 16 August [1839]]

"I have looked over the MS. sheets, but do not feel myself competent to give any decided opinion upon the probability of success in their publication. But thus far 1 dare venture to say:—that the book will never be highly esteemed by really scientific men. The definitions (in many cases merely translations of arbitrary terms given to classes) are to short to be of any service, and there are not a few trifling inaccuracies in matter and style. In order that a work of this nature should become ot authority the author's name should be known, as having worked in the department of science treated of, which is not the case in this instance." Etc.