Dear Sir

I am greatly indebted to you for your pleasant letter & for your great kindness in sending me the photographs, which I have been very glad to see.² I do not know whether they are quite distinct enough for engraving on wood, but think so; & when a new edition is required will show them to a wood-engraver.³ Any how I will give the case as coming from “a foreign naturalist”. The ears of the embryonic orang strike me as extremely curious: they seem wonderfully different, as far as my memory serves, from those of the adult animal; & I think it will be worth while to give an engraving of them.⁴ I enclose my own photograph as the only, though very poor, return which I can make for your two photographs.

When next you see M^r. Lankester will you give him my particular thanks for his interesting letter of April 17^th., which will be very useful to me, & for his betrayal of you as a case of atavism.⁵ I am glad to hear from M^r. Lankester of the young chimpanzee in Hamburgh with the points to the ears.⁶

Pray believe me, | yours truly obliged | Charles Darwin