Sends photographs he intends to use in Expression and asks for estimates of cost per thousand of each process [Woodburytype and Heliotype] suggested by RC and for different numbers of photos on each plate.

Obliged for letter about human ear. Comments on ears and on E. R. Lankester’s idea about the ear-lobe.

George [Darwin] plans a trip to America and would like FD to go [see 7757]. CD will gladly pay whole cost if the trip will not interfere with FD’s medical work.

Thanks for present of FWF’s The witness of history [1871].

CD will pay for the American trip if it takes place.

Asks whether FD can help him understand the eyes of cephalopods; is the structure the same as in the Vertebrata and are the parts developed from homologous layers of skin?

Has been pleased by a recent review.

Postscript: Is thinking of a cheap edition of the Origin [1872] in which he hopes to answer St George Mivart’s criticisms.

Asks FD whether he can get some references to good papers on cephalapod eyes.

Thanks AN for facts and corrections [for Descent].

The case of the gull must come out [Descent 2: 108 n. 9]. "Oh Lord, how difficult accuracy is!"