Comments on discussion of residual organs in Descent [ch. 1].

Describes his ability to contract the platysma myoides at will.

Suggests reason for loss of voluntary movement of ears in men and monkeys.

Apologises for shortcomings of his argument in earlier letters, explaining he has had little scientific education, but a life-long interest in progressive development. Resumes theorising.

Sends photographs of general paralytics. Expressions of exaltation of [these?] patients do not come out well in the photographs.

Is experimenting with idiots under his care. Has been unable to produce a blush in any one of them.

A friend with similar interests has asked to be introduced to CD, as he has some facts that will amuse him.

Corrects error in his letter [7652] about date of Wagler article in Isis. Wagler said it was females that had the yellow dorsal spot.