Hoss: (to Sam Clemens) I don't know about that name Mark Twain. It seem to me like that I've heard a lot better names than that before. You sure that's a fittin' name for a writer?
Sam: Now, back a couple of months ago, I was in California, a place called Calaveras County and the folks there seemed to think that they wanted to hold a, sort of a...a little frog jumping contest. Mrs. Billington: Yeah, I heard about it. You're the fellow who thinks up all that junk. Signs himself Josh.
Sam is referring to the famous story The Celebrated Jumping Frog of Calaveras Country, which has become one of Mark Twain's most beloved short stories.