Isaac had been pacing around the chamber during this lecture, and looking generally skeptical. More than one time he opened his mouth to make some objection. But at about the time Daniel finished, Isaac seemed to notice something. Daniel thought it was one of many papers and note-books scattered upon a certain table. Whatever it might have been, the sight of it caused Isaac to reconsider. Isaac's face slackened, as if the internal flame were being banked. He began stripping off his smock. 'Very well,' he said, 'please inform the others.'