In a letter of June 16th he writes: "It was with reference to the possibility of Natural Selection acting on organic types as distinguished from individuals,--a possibility which you once told me did not seem at all clear.") There does not seem any difficulty in understanding how the productiveness of an organism might be increased; but it was, as far as I can remember, in reducing productiveness that I was most puzzled.

But why I scribble about this I know not.
I have read your review of Mr.Allen's book (279/4.

See "Nature" (June 7th, 1877, page 98), a review of Grant Allen's "Physiological Aesthetics."), and it makes me more doubtful, even, than I was before whether he has really thrown much light on the subject.
I am glad to hear that some physiologists take the same view as I did about your giving too much credit to H.Spencer--though, heaven knows, this is a rare fault.

(279/5.

The reference is to Romanes' lecture on Medusa, given at the Royal Institution, May 25th.