“It’s simple enough⁠—and credible enough,” said Griffin, putting the serviette aside and leaning the invisible head on an invisible hand.

“No doubt, to you, but⁠—” Kemp laughed.

“Well, yes; to me it seemed wonderful at first, no doubt. But now, great god!⁠ ⁠… But we will do great things yet! I came on the stuff first at Chesilstowe.”

“Chesilstowe?”

“I went there after I left London . You know I dropped medicine and took up physics? No; well, I did. Light fascinated me.”

“Ah!”