At First Mark Twain Could Remember Things Whether They Happened or Not.
Clemens had a remarkable memory and admitted it. The following from his autobiography, which was published in the North American Review attests it:
"I used to remember Brother Harry walking into a fire outdoors when he was a week old. It was remarkable in me to remember a thing like that, which occurred when I was at young. And it was still more remarkable that I should cling to the decision for thirty years that I did remember it--for, of course, it never happened: he could not have been able to walk at that age. For many years I believed that I remembered helping my grandfather drink his whisky toddy when I was 6 weeks old, but I do no tell about that any more, now; I am grown old, and my memory is not as active as it used to be. When I was younger I could remember anything, whether it happened or not; but my faculties are deceasing now, and soon I shall be as I cannot remember any but the things that happened. It is sad to go to pieces like this, but we all have to do it."