ection for publication.

I enclose my "carte." Have you a photograph of yourself of any kind you
can send me? When you come to town next, may I beg the honour of a
sitting for my brother-in-law, Mr. Sims, 73 Westbourne Grove?--Yours
very sincerely,

ALFRED R. WALLACE.

P.S.--Your paper on _Lythrum salicaria_[46] is most beautiful. What a
wonderful plant it is! I long to hear your paper on Tendrils and hear
what you have got out of them. My old friend Spruce, a good botanist and
close observer, could probably supply you with some facts on that or
other botanical subjects if you would write to him. He is now at Kew,
but almost as ill as yourself.--A.R.W.

* * * * *

_Down, Bromley, Kent, S.E. February 1, 1865._

My dear Wallace,--I am much obliged for your photograph, for I have
lately set up a scientific album; and for the papers, which I will read
before long. I enclose my own photo, taken by my son, and I have no
other.

I fear it will be a long time before I shall be able to sit to a
photographer, otherwise I should be happy to sit to Mr. Sims.

Thanks for information about the Aru pig, which will make me very
cautious.

It is a perplexing case, for Nathusius says the skull of the Aru
resembles that of the Chinese breed, and he thinks that _Sus papuensis_
has been founded on a young skull; D. Blainville stating that an old
skull from New Guinea resembles that of the wild pigs of Malabar, and
these belong to the _S. scrofa_ type, which is different from the
Chinese domestic breed. The latter has not been found in a wild
condition.--Believe me, dear Wallace, yours very sincerely,

CH. DARWIN.

* * * * *

_9 St. Mark's Crescent, Regent's Park, N.W. Sept. 18, 1865._

Dear Darwin,--I should have written before to thank you for the copy of
your paper on climbing plants, which I read with great interest; I can
imagine how much pleasure the working out must have given you. I was
afraid you were too ill to make it advisable that you should be bothered
with letters.

I write now, in hopes you are better, to communicate a curious case of
_variation_ becoming at once _hereditary_, which was brought forward at
the British Association. I send a note of it on the other side, but if
you would like more exact particulars, with names and dates and a
drawing of the bird, I am sure Mr. O'Callaghan would send them to you.

I hope to hear that you are better,