When Mr. Barrymore saw that this was more than a passing whim, he called Sir Ralph to the rescue, Beechy and I jumped out, and the car was pushed to one side. Then, with all of us standing round, he proceeded to search for the mischief. Apparently nothing was wrong. The engine was cool; the pump generously inclined, and fat yellow fireflies flew out of the sparking-plugs when they were tested. Then Mr. Barrymore remembered the cause of the Prince's first accident, and looked at the carburetter; but there was not so much as a speck of dust. For a while he continued to poke, and prod, and hammer, Sir Ralph offering humorous advice, and pretending to be sure that, if his housekeeper Felicite were on the spot, the car would start for her in an instant. The mystery only thickened, however, and to make matters worse the Prince, who had been proudly spinning on ahead, came tearing back to see what had happened. Though he pretended to be sympathetic, he was visibly overjoyed at our misfortune, which turned the tables upon us for once, and his suggestions were enough to wreck the valvular system of a motor-car; not to mention the nervous system of a distracted chauffeur. "Perhaps the petrol's dead," said Mr. Barrymore, paying no heed to the Prince's ideas. He opened a new tin and was about to empty its contents into the reservoir, when he uttered an exclamation. "By Jove! Just look at that, Miss Destrey!" he said; and I couldn't help feeling flattered that he should appeal to me on a subject I didn't know anything about. He was peering at the small round air-hole leading down to the reservoir, so I peered too, and in spite of my ignorance I saw what he meant. The hole was entirely stopped up with the body of a pinkish-grey caterpillar, and Mr. Barrymore explained that the poor car had simply stopped because it couldn't breathe. No air had been able to reach the petrol in the reservoir, and therefore no spirit had trickled through to the carburetter. We had been delayed for more than half an hour by a mere worm, which had probably arrived with the clover; but when the automobile could fill her lungs again she started on at a great pace. We passed a wonderful old riverside town, that had one of the most remarkable churches we had seen yet; and by-and-by a fine city, set like a tiara on the forehead of a distant hill, seemed to spring up, peer at us from its eminence, and then dip down out of sight among other hills which made a dark foreground against white mountains. It was Bergamo; and not once did we see it again until we were almost in the place, when it deigned to show itself once more--an old, old city on a height, a newer city extended at its feet in a plain.