Occupied vainly with this problem, which was impossible to solve scientifically without experiment, he arrived, in the course of his extensive wanderings that afternoon, at the foothills of the big mountain group of Monte Sant’ Angelo, rising south from Pompeii, and here he unexpectedly came upon an elderly man, already grey-bearded, who, from his equipment with all sorts of implements, seemed to be a zoologist or botanist, and appeared to be making a search on a hot, sunny slope. He turned his head as Norbert came close to him, looked at the latter in surprise for a moment and then said, “Are you interested in _Faraglionensis_? I should hardly have supposed it, but it seems thoroughly probable that they are found, not only in the _Faraglioni_ of Capri, but also dwell permanently on the mainland. The method suggested by my colleague, Eimer, is really good; I have already used it often with the best of success. Please remain quite still——” The speaker stopped, stepped carefully forward a few paces and, stretched out motionless on the ground, held a little snare, made of a long grass-blade, before a narrow crevice in the rock, from which the blue, chatoyant little head of a lizard peeped. Thus the man remained without the slightest movement, and Norbert Hanold turned about noiselessly behind him and returned by the way he had come. It seemed to him dimly that he had already seen the face of the lizard-hunter once, probably in one of the two hotels; to this fact the latter’s manner pointed. It was hardly credible what foolishly remarkable purposes could cause people to make the long trip to Pompeii; happy that he had succeeded in so quickly ridding himself of the snare-layer, and being again able to direct his thoughts to the problem of corporeal reality or unreality, he started on the return. Yet a side street misled him once to a wrong turn and took him, instead of to the west boundary, to the east end of the extensive old city-wall; buried in thought, he did not notice the mistake until he had come right up to a building which was neither the “Diomed” nor the “Hotel Suisse.” In spite of this it bore the sign of an hotel; near by he recognized the ruins of the large Pompeiian amphitheatre, and the memory came to him that near this latter there was another hotel, the “Albergo del Sole,” which, on account of its remoteness from the station, was sought out by only a few guests, and had remained unknown to even him. The walk had made him hot; besides, the cloudy whirling in his head had not diminished; so he stepped in through the open door and ordered the remedy deemed useful by him for blood congestion, a bottle of lime-water. The room stood empty except, of course, for the fly-visitors gathered in full numbers, and the unoccupied host availed himself of the opportunity to recommend highly his house and the excavated treasures it contained. He pointed suggestively to the fact that there were, near Pompeii, people at whose