"Yes," he replied. "It was at Hoboken. De Aëry and myself spent years in the construction of that machine, and a large amount of money. On the day when the trial of its powers was to have taken place, the weather proved unfavorable, and we met with unexpected delays. The spectators, who had congregated by thousands, became impatient; and the mob, breaking in upon us, destroyed in an hour property which had cost us five thousand dollars and the labor of years." I felt obliged to sympathize with Mr. Bonflon. He had met with the usual fortune of public benefactors, and particularly of inventors. His success, however, should it prove real, in the unexampled brilliancy of its results, would more than compensate him for all his disappointments and losses. He would rank as the greatest of discoverers,--as the master mind of this master century. Leading him off from this one topic into general conversation, I held him thus engaged for an hour. I was charmed with his comprehensive intelligence, and with the scope and liberality of his views. In everything relating to mechanics, his opinions were marked with originality. This had evidently been his favorite field, where his quick perceptions and powers of concentration and analysis had elevated him to an eminence where he stood almost alone. I had never met his equal. In plausible suggestions relative to the possibilities of the future, he took me quite above my level, and left me floating in a maze of glittering bewilderment. But I could discover no breaks, no confusion in his mind, on the themes he presented. His premises were apparently well considered, and his conclusions the fair and natural sequences flowing from them. On the following day, Mr. Bonflon called on me again. In the interval, my friend and myself had held extended consultations. My friend, while externally calm as the surface of a summer sea, as was his wont, it was plain for me to see, was internally deeply stirred and excited by the extraordinary nature of Mr. Bonflon's revelations. Acknowledging a mutual and increasing interest in the intelligent inventor, we nevertheless parted in a wilderness of doubt. There was a mystery in the matter,--a surprise for the world or a surprise for ourselves,--which time, it would seem, with its busy thumb and finger, must be left to unravel at its leisure. Mr. Bonflon had not brought the California paper with him. The two or three copies only which had come into his possession had been handed around among his confidential friends, and he had not been able to lay his hand on one. He informed me that the "Flying Cloud" was expected to return in three days, and, after remaining two days on the Atlantic side of the continent, would then start on her third experimental trip to the Pacific. At that time he expected to make one of the party himself, and he invited me to accompany him.