To V. O. Kovalevsky 10 August 
Down, | Beckenham, Kent.
My dear Sir
It is no trouble to me to write short notes. I sent off duplicates this morning of 2 finally corrected sheets; & shall soon be able to send more.—1
There is a difficulty about the Heliotype Coy. as they want to charge far more than their printed estimate; & I do not know how we shall agree, but I will inform you as soon as I hear.2
We leave home for 8 days on Tuesday morning, as I am quite done up.—3
My book will now be finished very soon.—4
I am sorry to say that I have never even heard of the book to which you refer.5
Before you leave England pray come & lunch or dine here; I shall be most happy to see you.—6
Yours very sincerely | C. Darwin
P.S. I see I have forgotten to say, that the sole verbal agreement which I wish to make with you is that you shall give me some moderate percentage of any clear profits which you may make.—
Sends proofs and details [concerning VOK’s Russian translation of Expression (1872)].