Afterwards, when done, I will tell you my object--not that it is worth telling, though I myself am very curious on the subject.

I know and can perceive that the definition of "close species" is very vague, and therefore I should not care for the list being marked by any one, except by such as yourself.
Forgive this long letter.

I thank you heartily for all your assistance.
My dear old Master, Yours affectionately, C.Darwin.
Perhaps 3 pence would be hardly enough, and if the number of kinds does not turn out very great it shall be 6 pence per packet.
LETTER 324.

ASA GRAY TO CHARLES DARWIN.
(324/1.

In reply to Darwin's letter, June 8th, 1855, given in "Life and Letters," II., page 61.) Harvard University, Cambridge, U.S., June 30th, 1855.
Your long letter of the 8th inst.