"How, Monsieur?" inquired Darrin, turning his gaze on the face of the international plotter.
"Why, secure a good guide, engage a carriage drawn by good horses, and then move from point to point as fast as possible," replied Dalny. "I know Naples well. Perhaps I can offer my services for, say, this evening."
"Are the public places of interest likely to be open in the evening?" questioned Dave.
"Not the museums," admitted M. Dalny. "But there are many other things to be seen. Naples has several beautiful parks. Some of them contain notable statues. These parks are the nightly resort of all classes of the Italian community, who are always worth observing. Then, too, there are many curious glimpses to be had of the night life of the underworld of Naples. In a word, Monsieur Darrin, there are enough night sights, of one kind and another, to fill profitably a month in Naples. And, as I know the city, you may command me. I will be your guide. Shall we go to-night?"
"Where could we go, with the most advantage in the matter of sight-seeing?" Dave asked.
"Out toward Vomero," suggested young Count Surigny.
"Too fashionable, and very dull," replied Dalny, with a shake of his head.
"Then where?" asked Dan.
But Dalny's reply was lost to him, for at that moment Darrin, holding a rolled napkin at one side of the table, and below the level of the table top, waved it slowly back and forth. Dan was the only one of the party at the table who could see the moving napkin. By this simple wig-wag signal device Dave Darrin sent to his chum the silent message:
"Dalny is one of the plotters I overheard on the Casino veranda. Think he suspects us. Follow my lead."