Thanks PLS for his generous offer to go over the part on birds [in Descent]. Does not think PLS realises that there are more than 200 pages – most of which will have nothing new for him.
W. H. Hudson’s proofs have arrived ["Letters on the ornithology of Buenos Ayres", Proc. Zool. Soc. Lond. (1870): 87–9, 158–60, 332–4, 545–50, 671–3, 748–50, 798–82; (1871): 4–7, 258–62, 326–9].
Down. | Beckenham | Kent. S.E.
Nov 9. 1870
My dear Mr Sclater
Your offer is most generous & wd. be an immense benefit for my book.f1But you do not know what you are offering; there are about 200 pages, of thesize of my origin, on birds. I have corrected half of them in slips, & when insheets they wd be much better for you to read, though there wd bethe great disadvantage that I cd not without strong cause, makegreat alterations. There wd be hardly any thing new to you in anypart, & you cd in most cases be able give much better illustrationsthan I have been able to do. Therefore considering every thing, unlessyou renew yr offer, I will assume that you have not time to readthrough so many pages; but in this case I will most gladly accept yr offerof correcting another list of names.
With very sincere thanks | yours very truly | Ch. Darwin
P.S. I have recd Mr Hudson’s proof sheets but have not yet hadtime to read them—f2
The only possible interest my 4 chapters on Birds cd. have for youis the collection of facts on some trifling points, all relating moreor less to sex.