This much I knew of him; but of this marvelous machine of his, of the secrets of its construction and propelling force, what did I really know? Admitting that this multiple mechanism was driven by electricity, and that this electricity was, as we knew it had been in the "Albatross," extracted directly from the surrounding air by some new process, what were the details of its mechanism? I had not been permitted to see the engine; doubtless I should never see it.

On the question of my liberty I argued thus: Robur evidently intends to remain unknown. As to what he intends to do with his machine, I fear, recalling his letter, that the world must expect from it more of evil than of good. At any rate, the incognito which he has so carefully guarded in the past he must mean to preserve in the future. Now only one man can establish the identity of the Master of the World with Robur the Conqueror. This man is I his prisoner, I who have the right to arrest him, I, who ought to put my hand on his shoulder, saying, "In the Name of the Law --"