sfortune," suggested Mr.
Dalny.

"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."

The instant that the message ended Dan glanced slowly around him, then
upward at the ceiling.

Soon Dalny's interest in the table talk waned for outside on the
sidewalk he caught sight of a young Neapolitan dandy, standing on the
curb, his back turned to the restaurant as he swung a jaunty little
cane. The motions of that cane spelled out a message that only Dalny,
of all the party at the table, could read. And that message read:

"Get carriage, take Americans for drive at dark. Finally, direct
driver to turn into the Strada di Mara. Leave carriage with Americans
when urged by shop-keeper."

That was the whole message. It was plain enough, however, to instruct
Dalny as fully as he needed to be directed. The scoundrel, as he