The Professor’s imagination took fire at this hypothesis.

“No doubt,” I ventured to reply, “but what interest would he have in thus hiding so marvellous a discovery?”

“Why? Why? How can I tell? Did not Galileo do the same by Saturn? We shall see. I will get at the secret of this document, and I will neither sleep nor eat until I have found it out.”

My comment on this was a half-suppressed “Oh!”

“Nor you either, Axel,” he added.

“The deuce!” said I to myself; “then it is lucky I have eaten two dinners today!”

“First of all we must find out the key to this cipher; that cannot be difficult.”

At these words I quickly raised my head; but my uncle went on soliloquising.