From R. F. Cooke 6 December 1872
50A, Albemarle Street, London, W.
Decr. 6 1872
My dear Sir
Your last work is very much like our Gas, nearly exhausted.
Will you therefore send to Clowes any corrections you may have & I will order paper & see after the Heliotypes
Mr Murray thinks we may throw off 2000.?
Yours faithfully | Robt. Cooke
C. Darwin Esq