I spoke with unctuous satisfaction, for I really expected him to comprehend. He looked at my beaming countenance with grave suspicion, and slowly reddened. He said nothing. I still smiled, but my smile was fast freezing.

"Well?" I said, impatiently.

"You are jesting," he said. "That isn't the real answer."

"Why, yes, it is. Do you mean to say that you don't understand?"

"You jest so much. I never can tell—" he broke off, helplessly.

"But surely you see that," I urged. "How would you define humor?"

"Why, humor is something funny. There's nothing funny about—er—that that Carlyle said."

"Yes, but it's only a very delicate and occult way of exhibiting his acuteness," I said. "Don't you see? An appreciation of the under side of things—the side that does not lie on the surface."

"Are you serious?" he asked, as I leaned back to rest from my toil.

"Perfectly. But I can hardly believe that you are."