glance out of the window, with the air of a man who has talking to do. His doubts of the sanity of the entire business flashed and vanished again as he looked across to where Griffin sat at the breakfast-table,—a headless, handless dressing-gown, wiping unseen lips on a miraculously held serviette.
"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!"
"Optical density! The whole subject is a network of riddles—a network with solutions glimmering elusively through. And being but two and twenty and full of enthusiasm, I said, 'I will devote my life to this. This is worth while.' You know what fools we are at two and twenty?"
"Fools then or fools now," said Kemp.
"As though Knowing could be any satisfaction to a man!
"But I went to work—like a nigger. And I had hardly worked and thought about the matter six months before light came through one of the meshes suddenly—blindingly! I found a general principle
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