"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 watched the swinging movements of the cane, looked out into the street between half-closed eyelids, slowly puffing out rings of smoke from his long cigar.

"We are becoming dull, good friends," laughed Dalny presently, glancing at the others. "Suppose we order more coffee."

"No more for me, thank you," protested Dave.

"But you have had hardly any coffee," Dalny declared.

"I am ready to admit that I can't keep up with the average American in drinking coffee," Dave replied.

"But you will have more, my dear Dalzell," urged Dalny.

Dan, who was inwardly agitated over the information he had received secretly from his chum, looked at Dalny almost with a start. In Dan's soul there was loathing for this foreigner with the engaging smile.

"I do not believe I can stand any more coffee," confessed Dan.

"So you and I, Surigny, must drink all the coffee at this table," said Dalny, with a shrug of his shoulders.

"I can drink a little more," replied the Count.

The day was now rapidly waning, bringing on a balminess of evening such as is found in few places other than Naples. The streets were becoming crowded with pedestrians.

"Waiter," called Dalny, "you will be good enough to secure for us a carriage with good horses. Get it as quickly as you can."

But the waiter, perceiving a signal from Dalny, knew that the carriage must not arrive too soon.

In the meantime Dave scanned the bill that had been presented for the meal, then laid a banknote on the bill. The waiter, returning, attended to the paying of the bill and received his "tip" from the change that he brought back.

The party lingered at the table to wait for the arrival of the carriage that was intended to convey Dave Darrin and Dan Dalzell to their death.

"My dear Count," said Dalny presently, "I regret much that the appointment which you told me you had for this evening will prevent you from going with us. Can you not manage to break the appointment without doing injustice to others?"

Taking his cue from the manner in which the question was put, the Comte of Surigny replied:

"It would delight me beyond measure to be one of the party to-night, but it is impossible. My appointment cannot be set aside."

The restaurant was brilliantly lighted, and the street lights had begun to flash out as the carriage arrived.

"Now, for a night of real sight-seeing!" cried Dalny, rising eagerly.

"My dear Americans, I promise you something such as you have never before experienced!"

"I am heartily sorry that you are prevented from going with us, Surigny," declared Dave, holding out his hand to the young Frenchman.

"I shall pray for better fortune next time," smiled the Count, rather sadly.

"We are all desolate that you cannot go with us, Surigny," declared Dalny, also holding out his hand. Dan, too, shook hands with Surigny.

Then the international plotter led the two Americans to the carriage awaiting outside.

After the Count of Surigny had waved his hand to the party and had walked away, Dalny placed Dave and Dan on the rear seat of the barouche, while he himself sat facing them.

A few words in Italian from Dalny, and the horses started. For half an hour the driver took his fares past ordinary sights.

"But we are not much interested, driver," cried Dalny, turning at last to the man who held the lines. "We are bored with this dullness, when Naples holds so much that may be seen by night. Take us through the Strada di Mara."

So the driver headed his horses toward the eastern, or older, part of the city. The Strada di Mara leads through one of the most thickly populated sections of Naples, and a part of the street extends up a steep hillside.

"You see how poor the people are here," said Dalny, as the horses slowed down to a walk. "We shall come soon, however, to a more interesting part of the street. Crime lurks here, also; not the more desperate crimes though. The Strada di Mara, in one part, is the resort of thieves who wish to dispose of their petty plunder by turning it into cash. And, as strange merchandise is dealt in here, the shops offer a variety of wares. We will presently look into one or two of the shops."

"What on earth can Dalny be driving at?" wondered young Ensign Darrin.

"Can he think that we would enter such shops, and buy the plunder that thieves have sold there?"

At the next street corner an Italian lad with a sweet voice began to sing. Danny Grin noticed that most of the people in this steep, narrow alley, that was by courtesy called a street, were now going indoors.

Only a man here and there remained outside.

"That's curious," thought Dan to himself. "Don't these people like music, that a street singer should drive them inside?"

When the carriage had pa.s.sed on to the next block a man came out of a shop and waved his hand to the driver, who promptly reined in his horses.

"Gentlemen," urged the shop-keeper, in English, "be kind enough to step inside and look at some of the bargains I am offering."

Dave, who understood, whispered to Dalny:

"It can hardly be worth while to get out and look at what is probably stolen goods."

"On the contrary," rejoined Dalny, "this man is likely to show us some things that will help me in explaining the interesting points of Naples to you. Come!"

Opening the door of the carriage, the international plotter stepped out, leading the way. Of course Dave and Dan followed him.

It now turned out that the Italian's shop was some doors farther up along this block. As he led the way, and Dalny and the Americans followed, neither young officer observed that the driver had turned his horses around and was driving away.

At the same time, the few men now on the sidewalk of this block started to close in on the little party.

Tragedy was stepping across the threshold!