True, the story of the death of Hugh’s father was an unusually strange one, curious in every particular—and stranger still that the secret was held by this beautiful, but mysterious, woman who lived in such luxury, and who gambled so recklessly and with invariable good fortune.

As they walked back to the town Hugh’s heart sank within him.

“She will die,” he muttered bitterly to himself. “She’ll die, and I shall never learn the truth of the poor guv’nor’s sad end, or the reason why I am being forced to marry Louise Lambert.”

“It’s an iniquitous will, Hugh!” declared his friend. “And it’s infernally hard on you that just at the very moment when you could have learnt the truth that shot was fired.”

“Do you think the woman had any hand in my father’s death?” Hugh asked. “Do you think that she had repented, and was about to try and atone for what she had done by confessing the whole affair?”

“Yes. That is just the view I take,” answered Brock. “Of course, we have no idea what part she played in the business. But my idea is that she alone knows the reason why this marriage with Louise is being forced upon you.”

“In that case, then, it seems more than likely that I’ve been followed here to Monte Carlo, and my movements watched. But why has she been shot? Why did not her enemies shoot me? They could have done so twenty times during the past few days. Perhaps the shot which hit her was really intended for me?”

“I don’t think so. There is a monetary motive behind your marriage with Louise. If you died, your enemy would gain nothing. That seems clear.”

“But who can be my secret enemy?” asked the young man in dismay.

“Mademoiselle alone knows that, and it was undoubtedly her intention to warn you.”

“Yes. But if she dies I shall remain in ignorance,” he declared in a hard voice. “The whole affair is so tangled that I can see nothing clearly—only that my refusal to marry Louise will mean ruin to me—and I shall lose Dorise in the bargain!”

Walter Brock, older and more experienced, was equally mystified. The pessimistic attitude of the three doctors who had attended the injured woman was, indeed, far from reassuring. The injury to the head caused by the assailant’s bullet was, they declared, most dangerous. Indeed, the three medical men marvelled that she still lived.

The two men walked through the palm-lined garden, bright with flowers, back to their hotel, wondering whether news of the tragedy had yet got abroad. But they heard nothing of it, and it seemed true, as Walter Brock had declared, that the police make haste to suppress any tragic happenings in the Principality.

Though they were unconscious of it, a middle-aged, well-dressed Frenchman had, during their absence from the hotel, been making diligent inquiries regarding them of the night concierge and some of the staff.

The concierge had recognized the visitor as Armand Buisson, of the police bureau at Nice. It seemed as though the French police were unduly inquisitive concerning the well-conducted young Englishman and his companion.

Now, as a matter of fact, half an hour after Hugh had left the Villa Amette, Ogier had telegraphed to Buisson in Nice, and the latter had come along the Corniche road in a fast car to make his own inquiries and observations upon the pair of Englishmen. Ogier strongly suspected Henfrey of firing the shot, but was, nevertheless, determined to remain inactive and leave the matter to the Prefecture of the Department of Alpes Maritimes. Hence the reason that the well-dressed Frenchman lounged in the hall of the hotel pretending to read the “Phare du Littoral.”

Just before noon Hugh went to the telephone in the hotel and inquired of Cataldi the progress of his mistress.

“She is just the same, m’sieur,” came the voice in broken English. “Santa Madonna! How terrible it all is! Doctor Leneveu has left, and Doctor Duponteil is now here.”

“Have the police been again?”

“No, m’sieur. Nobody has been,” was the reply.

So Hugh rang off and crossed the hall, little dreaming that the well-dressed Frenchman had been highly interested in his questions.

Half an hour later he went along to the Metropole, where he had an engagement to lunch with Dorise and her mother.

When they met, however, Lady Ranscomb exclaimed:

“Why, Hugh, you look very pale. What’s the matter?”

“Oh, nothing,” he laughed forcedly. “I’m not very bright to-day. I think it was the sirocco of yesterday that has upset me a little, that’s all.”

Then, while they were seated at table, Dorise suddenly exclaimed:

“Oh! do you know, mother, that young French lady over yonder, Madame Jacomet, has just told me something. There’s a whisper that the mysterious woman, Mademoiselle of Monte Carlo, was shot during the night by a discarded lover!”

“Shot!” exclaimed Lady Ranscomb. “Dear me! How very dreadful. What really happened?”

“I don’t know. Madame Jacomet was told by her husband, who heard it in Ciro’s this morning.”

“How terrible!” remarked Hugh, striving to remain calm.

“Yes. But women of her class invariably come to a bad end,” remarked the widow. “How pleased I am, Dorise, that you never spoke to her. She’s a most dreadful person, they say.”

“Well, she evidently knows how to win money at the tables, mother,” said the girl, lifting her clear blue eyes to those of her lover.

“Yes. But I wonder what the scandal is all about?” said the widow of the great engineer.

“Oh! don’t trouble to inquire Lady Ranscomb,” Hugh hastened to remark. “One hears scandal on every hand in Monte Carlo.”

“Yes. I suppose so,” replied the elder woman, and then the subject was dropped.

So the ugly affair was being rumoured. It caused Hugh a good deal of apprehension, for he feared that his name would be associated with that of the mysterious Mademoiselle. Evidently one or other of the servants at the Villa Amette had been indiscreet.

At that moment, in his private room at the bureau of police down in Monaco, Superintendent Ogier was carefully perusing a dossier of official papers which had been brought to him by the archivist.

Between his thin lips was a long, thin, Swiss cigar—his favorite smoke—and with his gold-rimmed pince-nez poised upon his aquiline nose he was reading a document which would certainly have been of considerable interest to Hugh Henfrey and his friend Walter Brock could they have seen it.

Upon the pale yellow paper were many lines of typewriting in French—a carbon copy evidently.

It was headed: “Republique Francaise. Department of Herault. Prefecture of Police. Bureau of the Director of Police. Reference Number 20197.B.,” and was dated nearly a year before.

It commenced:

“Copy of an ‘information’ in the archives of the Prefecture of the Department of Herault concerning the woman Marie Mignot, or Leullier, now passing under the name of Yvonne Ferad and living at the Villa Amette at Monte Carlo.

“The woman in question was born in 1884 at Number 45 Rue des Etuves, in Montpellier, and was the daughter of one Doctor Rigaud, a noted toxicologist of the Faculty of Medicine, and curator of the University Library. At the age of seventeen, after her father’s death, she became a school teacher at a small school in the Rue Morceau, and at nineteen married Charles Leullier, a good-looking young scoundrel who posed as being well off, but who was afterwards proved to be an expert international thief, a member of a gang of dangerous thieves who committed robberies in the European express trains.

“This fact was unknown to the girl, therefore at first all went smoothly, until the wife discovered the truth and left him. She then joined the chorus of a revue at the Jardin de Paris, where she met a well-to-do Englishman named Bryant. The pair went to England, where she married him, and they resided in the county of Northampton. Six months later Bryant died, leaving her a large sum of money. In the meantime Leullier had been arrested by the Italian police for a daring robbery with violence in a train traveling between Milan and Turin and been sentenced to ten years on the penal island of Gorgona. His wife, hearing of this from an Englishman named Houghton, who, though she was unaware of it, was following the same profession as her husband, returned to France. She rented an apartment in Paris, and afterwards played at Monte Carlo, where she won a considerable sum, with the proceeds of which she purchased the Villa Amette, which she now occupies each season.”

“Extracts of reports concerning Marie Leullier, alias Yvonne Ferad, are herewith appended:

“Criminal Investigation Department, New Scotland Yard, London—to the Prefecture of Police, Paris.

“Mademoiselle Yvonne Ferad rented a furnished house at Hove, near Brighton, in June, 1918. Afterwards moved to Worthing and to Exeter, and later took a house in the Cromwell Road, London, in 1919. She was accompanied by an Italian manservant named Cataldi. Her conduct was suspicious, though she was undoubtedly possessed of considerable means. She was often seen at the best restaurants with various male acquaintances, more especially with a man named Kenworthy. Her association with this person, and with another man named Percy Stendall, was curious, as both men were habitual criminals and had served several terms of penal servitude each. Certain suspicions were aroused, and observation was kept, but nothing tangible was discovered. It is agreed, however, that some mystery surrounds this woman in question. She left London quite suddenly, but left no debts behind.”

“Information from the Borough Police Office, Worthing, to the Prefecture of Police, Department of Herault.

“Mademoiselle Yvonne Ferad has been identified by the photograph sent as having lived in Worthing in December, 1918. She rented a small furnished house facing the sea, and was accompanied by an Italian manservant and a French maid. Her movements were distinctly mysterious. A serious fracas occurred at the house on the evening of December 18th, 1918. A middle-aged gentleman, whose name is unknown, called there about seven o’clock and a violent quarrel ensued between the lady and her visitor, the latter being very seriously assaulted by the Italian. The constable on duty was called in, but the visitor refused to prosecute, and after having his injuries attended to by a doctor left for London. Three days later Mademoiselle disappeared from Worthing. It is believed by the Chief Constable that the woman is of the criminal class.”

Then Charles Ogier, inspector of the detective police of Monaco, smiled, laid down his cigar, and took up another and even more interesting document.