"Yes, that is the latest theory."

"It seems reasonable; but why didn't our grandmothers get poisoned?"

"Perhaps they did,—but they didn't know what to call it."

"You think that is so,—that we are poor little chemical retorts? It sounds—horrid."

"It sounds sensible, but it isn't the whole of it."

"Tell me what you think!"

"I don't like to interfere with Dr. Potts," he suggested.

"I shouldn't talk to you professionally, I know; but it is in my mind most of the time. What is the matter? What is wrong?"

"I, too, have thought about it a great deal." He smiled and his black eyes had a kindly gleam.

"Do you believe as Dr. Potts does that it is all what you eat, just matter? If your mind is so much troubled, if you have these queer ideas, it can't be altogether the chemistry?"