The infolded point of the human ear, discovered by Mr. Woolner, and described in the 'Descent of Man,' seems especially to have struck the popular imagination; my father wrote to Mr. Woolner:-- "The tips to the ears have become quite celebrated. One reviewer ('Nature') says they ought to be called, as I suggested in joke, Angulus Woolnerianus. ('Nature' April 6, 1871. The term suggested is Angulus Woolnerii.) A German is very proud to find that he has the tips well developed, and I believe will send me a photograph of his ears."] CHARLES DARWIN TO JOHN BRODIE INNES. (Rev. J. Brodie Innes, of Milton Brodie, formerly Vicar of Down.) Down, May 29 [1871]. My dear Innes, I have been very glad to receive your pleasant letter, for to tell you the truth, I have sometimes wondered whether you would not think me an outcast and a reprobate after the publication of my last book ['Descent']. (In a former letter of my father's to Mr. Innes:--"We often differed, but you are one of those rare mortals from whom one can differ and yet feel no shade of animosity, and that is a thing which I should feel very proud of, if any one could say it of me.") I do not wonder at all at your not agreeing with me, for a good many professed naturalists do not. Yet when I see in how extraordinary a manner the judgment of naturalists has changed since I published the 'Origin,' I feel convinced that there will be in ten years quite as much unanimity about man, as far as his corporeal frame is concerned... [The following letters addressed to Dr. Ogle deal with the progress of the work on expression.] Down, March 12 [1871]. My dear Dr. Ogle,