“Well, my dear sir, knowing the vindictive character of his old associates, he was trying to hide his own identity from everybody as long as he could. His secret was a shameful one, and he could not bring himself to divulge it. However, wretch as he was, he was still living under the shield of British law, and I have no doubt, Inspector, that you will see that, though that shield may fail to guard, the sword of justice is still there to avenge.”

Such were the singular circumstances in connection with the Resident Patient and the Brook Street Doctor. From that night nothing has been seen of the three murderers by the police, and it is surmised at Scotland Yard that they were among the passengers of the ill-fated steamer Norah Creina, which was lost some years ago with all hands upon the Portuguese coast, some leagues to the north of Oporto. The proceedings against the page broke down for want of evidence, and the Brook Street Mystery, as it was called, has never until now been fully dealt with in any public print.