Mem." I., 1866-69, page 193.

On the back of the paper is written, "I cannot avoid thinking this paper fanciful.") It seems also that I have quite misrepresented your joint view; this has vexed me much.

I confess that I have never been able to grasp fully what you wish to show, and I presume that this must be owing to some dulness on my part...As the case stands, the law of acceleration and retardation seems to me to be a simple [ ?] statement of facts; but the statement, if fully established, would no doubt be an important step in our knowledge.

But I had better say nothing more on the subject, otherwise I shall perhaps blunder again.
I assure you that I regret much that I have fallen into two such grave errors.
LETTER 253.

A.HYATT TO CHARLES DARWIN.
(253/1.