"By Jove!" I explained.

"To be sure!" ejaculated Billings, looking extremely silly.

The professor appeared not ungratified with the sensation he had produced and condescended to smile; that is, if you can call a creasing and wrinkling like the cracked end of a hard-boiled egg a smile.

"You say, 'sit down,' sir," he said, addressing me. "I ask you, in turn: Is not 'sitting down' recrudescence back to the primordial?"

So saying, he took a pinch at my shirt front and stepped back again impressively. Still addressing me, he continued:

"It is such thoughtless indulgence of muscles growing obsolescent that retards the evolution of our species, a species, sir, which I claim is coessential in fundamental attributes with contemporaneous amphibia. Ha! I surprise you, perhaps? Can you note in me a resemblance to a batrachian?"

I didn't know. And, dash it, I was afraid to chance it. Tried my jolly best to think what a batrachian was. It came to me like a flash that it sounded like something in Italy.

"By Jove, you do, though, awfully!" I exclaimed, trying to brighten up over it. "Doesn't he, Billings? Noticed a resemblance right off, don't you know."

Billings went to nodding with an air of pleased surprise. Dash me if I believed he knew what a batrachian was, though, any more than I did. But Billings never admits anything.

"Sure," he said glibly. "I was half suspecting it; why, look at the skin, you know—and features!"