"MYSTERIOUS OCCURRENCE IN THE WEST END. "An affair of some magnitude--perhaps a remarkable crime--has taken place in an Albert Gate mansion. "Owing to the reticence of the authorities, it is at present impossible to arrive at a definite conclusion as to the nature or extent of the incident, but it is quite certain that public interest will be much excited when details are forthcoming. All sorts of rumours attain credence in the locality, the murder of several prominent persons being not the least persistent of these. Without, however, giving currency to idle speculation, several authentic statements may be grouped into a connected form. "Four weeks ago a party of Turkish gentlemen of high rank in Constantinople, arrived in London and took up their abode in the house in question, after some structural alterations, pointing at great security within and without, had been planned and executed. "Attending these Turkish gentlemen, or officials, was a numerous suite of Moslem guards and servants, whilst, immediately following their arrival, came from Amsterdam some dozen noted experts in the diamond-cutting industry. These were lodged in a neighbouring private hotel, where they were extremely uncommunicative as to their business in London. They were employed during the day at the Albert Gate house. The presence in the mansion, both day and night, of a strong force of Metropolitan police, tended to excite local curiosity to an intense degree, but no clear conception of the business of the occupants was allowed to reach the public. "Whatever it was that took place, the full particulars were not only well known to the authorities--the presence of the police hints even at Governmental sanction--but matters proceeded on normal lines until yesterday morning. "Then it became clear that a remarkable development must have occurred during the preceding night, as the whole of the Dutch workmen and the Turkish attendants were taken off in cabs by the police, not to Morton Street Police Station, but to Scotland Yard; this in itself being a most unusual course to adopt. They are unquestionably detained in custody, but they have not yet been charged before a magistrate. "The police, later in the day, carried off some of these men's personal belongings, from both hotel and mansion. "A sinister aspect was given to the foregoing mysterious proceedings by the presence at Albert Gate, early in the day, of two police surgeons, who were followed, about twelve o'clock, by Dr. Tennyson Coke, the greatest living authority on toxicology.