In the early morning Haasberg went off to the nearest commissariat of police. They took the matter in hand without delay, and within the hour had obtained some valuable information from the personnel of the hotel. To begin with, it was established that at about ten minutes past ten the previous evening, that is to say a quarter of an hour or so after Haasberg had parted from Arthur Saunders outside his own lodgings, the latter had returned to the Majestic, and at once asked for the tin box which he had deposited in the bureau. There was some difficulty in acceding to his request, because the clerk who was in charge of the keys of the strong-room could not at once be found. However, M. le Capitaine was so insistent that search was made for the clerk, who presently appeared with the keys, and after the usual formalities, handed over the tin box to Saunders, who signed a receipt for it in the book. Haasberg had since then identified the signature which was quite clear and incontestable.
Saunders then went upstairs, refusing to take the lift, and five minutes later he came down again, nodded to the hall porter, and went out of the hotel. No one had seen him since, but during the course of the morning, the valet on the fourth floor had found an empty tin box in the gentlemen's cloakroom. This box was produced, and to her unutterable horror Mary Saunders recognised it as the one which had held the pearl necklace.
The whole of this evidence as it gradually came to light was a staggering blow both to Mary and to Haasberg himself, because until this moment neither of them had thought that the necklace was in jeopardy: they both believed that it was safely locked up in the strong-room of the hotel.
Haasberg now feared the worst. He blamed himself terribly for not having made more certain of the mysterious visitor's identity. He had not yet come to the point of accusing his brother-in-law in his mind of a conspiracy to steal the necklace, but frankly, at this stage, he did not know what to think. Saunders's conduct had—to say the least—been throughout extremely puzzling. Why had he elected to spend the night in Paris, when all arrangements had been made for him and his wife to travel straight through? Who was the mysterious visitor with the walrus moustache, vaguely referred to by both Arthur and Mary as "old Pasquier"? And above all why had Arthur withdrawn the necklace from the hotel strong-room where it was quite safe, and, with it in his pocket, walked about the streets of Paris at that hour of the night?
Haasberg was quite convinced that "old Pasquier" knew something about the whole affair, but, strangely enough, Mary persisted in asserting that he was quite harmless and an old friend of Arthur's who was beyond suspicion. When further pressed with questions, she declared that she had no idea where the man lodged, and that, in fact, she believed that he had left Paris the self-same evening en route for Brussels, where he was settled in business.
Enquiry amongst the personnel of the hotel revealed the fact that Captain Saunders's visitor had been seen by the hall porter when he came soon after half-past eight, and asked whether le Capitaine Saunders had finished dinner; his question being answered in the affirmative, he went upstairs, refusing to take the lift. Half an hour or so later he was seen by one of the waiters in the lounge hurriedly crossing the hall, and finally by the two boys in attendance at the swing doors when he went out of the hotel. All agreed that the man was very tall and thick-set, that he wore a heavy moustache and a pair of gold-rimmed spectacles. He had on a bowler hat and an overcoat with the collar pulled right up to his ears. The hall porter, who himself spoke English fairly well, was under the impression that the man was not English, although he made his enquiries in that language.
In addition to all these investigations, the commissaire de police, on his second visit to the hotel, was able to assure Haasberg that all the commissariats in and around Paris had been communicated with by telephone so as to ascertain whether any man answering to Saunders's description had been injured during the night in a street accident, and taken in somewhere for shelter; also that a description of the necklace had already been sent round to all the Monts-de-Piété throughout the country. The police were also sharply on the lookout for the man with the walrus moustache, but so far without success.
And Mary Saunders obstinately persisted in her denial of any knowledge about him. "Arthur," she said, "sometimes saw 'old Pasquier' in London"; but she did not know anything about him, neither what his nationality was, nor where he lodged. She did not know when he had left London, nor where he could be found in Paris. All that she knew, so she said, was that his name was Pasquier, and that he was in business in Brussels; she therefore concluded that he was Belgian.
Even to her own brother she would not say more, although he succeeded in making her understand how strange her attitude must appear both to the police and to her friends, and what harm she was doing to her husband, but at this she burst into floods of tears and swore that she knew nothing about Pasquier's whereabouts, and that she believed him to be innocent of any attempt to steal the necklace or to injure Arthur.
There was nothing more to be said for the present and Haasberg sent the telegram in his sister's name to Sir Montague Bowden because he felt that some one less busy than himself should look after the affair and be a comfort to Mary, whose mental condition appeared pitiable in the extreme.