A knock on the door brought them both back to--the deck of the _Mauretania_, with terra firma not so far distant below!

"There he is now," she whispered nervously. "Who shall I say you are?

And what?"

"Oh, any old thing--Warren, Mr. Warren. Leave the cla.s.sification to me.

Self-identification is an American trait!"

She crossed the cabin, and after a timid pause opened the door.

"Come in," she murmured.

"Ah, I'm intruding," exclaimed Carlos, Duke of Alva, with an intonation which expressed an invitation for Warren Jarvis to make a graceful exit.

"Not at all," blankly observed Jarvis. "I've just been discussing my professional task at the castle; as a member of the family you can give me some good working material."

"I don't understand," spluttered Carlos, taken aback.

"Pardon me, cousin. This is Mr. Warren, of America, who has consented to help me. My cousin, the Duke of Alva." She walked behind the two men, comparing them keenly: the deadly parallel column was not at all unfavorable to the insouciant Kentuckian.

"Glad to know you," volunteered Jarvis. "Have a cigarette?"

"I never smoke in the presence of ladies," retorted the Duke. Then with a patronizing air he added: "I am honored to meet you, sir, if you are in my royal cousin's employ. So, you are interested in the castle?"

"Oh, not so much in the castle as in the ghost. I'll attend to him."

"And is that your regular profession?"

"You are a good guesser, my dear Duke. That is my business--solving mysteries--locking up family skeletons--chasing spooks and putting salt on their tails. We have a professional name for it in the United States."

"And what is that, sir?" asked Carlos, uncertain whether to be affronted or to draw out this strange bird to a confidence. A quick glance at his cousin's immobile face gave him no hint.

Jarvis continued amiably.

"We are living in an age of specialists. You have doubtless heard of Farley the Strike Breaker, of Roosevelt the Trust Breaker. I forgot to bring my business cards with me; but if I may be so immodest as to tell the truth, I am known from Bowling Green to the Golden Gate as Warren the Ghost Breaker!"

[Ill.u.s.tration: "_I am known from Bowling Green to the Golden Gate, as Warren the Ghost Breaker_"]

This astounding news fairly took the Duke off his feet. He mentally clawed the air for his equilibrium.

"_Madre de Dios!_" e.j.a.c.u.l.a.t.ed the Duke, dropping his sword-cane. As he recovered from his astonishment, the Princess interceded: "I am so glad you came. I promised the Ghost Breaker that you would join us shortly.

You will be able to tell him, so much better than I, of all the strange circ.u.mstances. I have only given him a rough outline of what happened up to the time I left my brother on his way to the castle."

Carlos sank into a chair, irritated at the American's disinterested lack of courtesy: Jarvis had not even risen from his seat on the trunk.

Somehow or other Carlos despised that trunk!

"I will be delighted to throw any possible light on the mystery of the castle. But first let us leave your brother in peace, to let me know why you came to America?"

Maria Theresa drew the locket from her reticule.

"This is what brought me."

"May I see it?" and the Duke held out his hand, ingratiatingly. "What a charming old antique!"

"No, Carlos. Rather you may see the locket, but not the memorandum in the back."

The Duke registered an expression of polite surprise.

"Memorandum?"

"Yes," and the Princess removed a small bit of paper from the ivory back, swinging it forward to her cousin's hand, on the long silver chain. The n.o.bleman's dark face a.s.sumed a ruddier hue, as he caught the trinket in fingers which Jarvis noticed were trembling in tell-tale manner. Jarvis watched the two of them in silence.

"It's a curious old piece of work. And you came all the way to New York to get it?"

"Yes."

"You were fortunate to find it so soon."

"I knew where to find it, Carlos; yet I was almost too late. Think of it, after that dear old family heirloom had lain in an antique shop for nearly ten years--suddenly there came two inquiries for it in a day, two beside my own. The first was from a distinguished-looking gentleman who had called early in the morning, describing it roughly to the old man, urging him to hunt for it. It took an hour to find it--and I happened to come in at the end of the hour. I doubled the offer of a museum collector, and trebled that of the distinguished-looking gentleman. I secured it."

Here, the Princess shot a sharp look into the half-closed eyes of the Duke.

"Who do you suppose could have wanted that locket but myself, Carlos?"

"I suppose," and it was the a.s.sumed indifference of a cornered schemer, "it has already occurred to you that I am the 'distinguished-looking gentleman.' Has it, cousin?"

The girl's curiosity piqued her.

"But how did you learn about the memorandum, Carlos?"

"I didn't, cousin. I had not the slightest suspicion that the locket contained an important secret; I doubt it now. I was merely following my pet hobby, in addition to a little family sentiment. I wanted to recover some of those precious heirlooms which had been scattered to the four winds."

"When did you know that this one had been scattered to New York,--on your last visit to the boulevards of Paris?" And Jarvis' smile was as ingenuous as that of a babe of two.

The Duke of Alva scowled. There seemed something uncanny in the sharpness of this American; but he prided himself upon the power of diplomacy.

"I have seldom been in Paris: they are not so much interested in antiques as in very lively moderns, Mr. Ghost Breaker!... But there, you interrupted my thought! You would be surprised to see the collection which I have already rescued, and which, Maria, will some day be yours. You Americans are not noted as really astute collectors, Mr. Jarvis."

"Well, our collectors who don't worry over millions are frequently stung by clever counterfeits. But we laboring men, who must devote all our time to our work, are usually able to tell imitations from the real thing. We are not impressed by 'four-flushing,' your Excellency!"

The Duke scowled at Warren, vainly attempting to divine the meaning of the Yankee slang. But the Kentuckian was impatient: he knew that debates were seldom as productive as labor in a workshop, when it came down to fundamentals.

Carlos was impatiently interrupted.

"Well, so much for the treasure--let's hear about the ghost. Of course I'm _certain_ that there's no connection between the two, in such an aristocratic land as Spain, which scoffs at the American pursuit of the miserable, despised dollar.... What's your private opinion of this ghost? Is he a real, dependable, h.e.l.l-bent spook, deserving all this press stuff which has been given to him? I've had so much experience with spirits--being a native Kentuckian--that they must be 100-proof to interest me!... Do you really put any stock in ghosts, Duke?"

"Yes, Mr. Warren, I am convinced that there are such things. This world is filled with evidences of the supernatural."

"Then you honestly believe this castle is haunted?"