Of course, physical demonstrations would never do: I should frighten my brilliant and learned audience out of its seven senses; but, as for mere mathematics--well, I may make them stare, and set a good many highly-respected brains--my gifted friend Huysman's, among them--working pretty hard.

Of course, he will be especially furious, but there's no harm in that either.

Yes, I shall certainly do it.

If he can't understand my demonstrations, that's not my concern." He went and sat down at his desk, still smiling, and went very carefully through the notes he had already made, and then through Professor Hartley's letter, and his speculations on the Forty-Seventh Proposition.
This done, he plunged into a fresh vortex of figures, and symbols, and diagrams, in which he remained for the next two hours, his mind hovering, as it were, over the borderland which at once divides and unites the higher and the lower planes.

When he returned to earth, the dreamy, abstracted look faded away from his face; his eyes lit up, and the pleasant smile came back.
He opened the middle drawer in his desk, and took out the first page of the fair copy of his notes, which Nitocris had made for him--thinking the while how easy it would have been for him in the state of N4 to take it out without opening the drawer at all--and looked at it.