From R. F. Cooke 23 February 1869
50A, Albemarle Street, London, W.
Feby 23 1869
My dear Sir
I think the expense of Fritz Muller, will be about £86 for 750 Copies—or less than £10 extra for 1000. I will order a stoutish paper & as the book will be 160 pages we might put 5/ or 6/– on it & then there would be a profit.
Yours faithfully | Robt. Cooke
C. Darwin Esq