TO F.W.HUTTON.

Down, April 20th [1861].
I hope that you will permit me to thank you for sending me a copy of your paper in "The Geologist" (124/1.

In a letter to Hooker (April 23rd?
, 1861) Darwin refers to Hutton's review as "very original," and adds that Hutton is "one of the very few who see that the change of species cannot be directly proved..." ("Life and Letters," II., page 362).

The review appeared in "The Geologist" (afterwards known as "The Geological Magazine") for 1861, pages 132-6 and 183-8.

A letter on "Difficulties of Darwinism" is published in the same volume of "The Geologist," page 286.), and at the same time to express my opinion that you have done the subject a real service by the highly original, striking, and condensed manner with which you have put the case.