All that day and the next and the next Holmes was in a mood which his friends would call taciturn, and others morose. He ran out and ran in, smoked incessantly, played snatches on his violin, sank into reveries, devoured sandwiches at irregular hours, and hardly answered the casual questions which I put to him. It was evident to me that things were not going well with him or his quest. He would say nothing of the case, and it was from the papers that I learned the particulars of the inquest, and the arrest with the subsequent release of John Mitton, the valet of the deceased. The coroner’s jury brought in the obvious Wilful Murder, but the parties remained as unknown as ever. No motive was suggested. The room was full of articles of value, but none had been taken. The dead man’s papers had not been tampered with. They were carefully examined, and showed that he was a keen student of international politics, an indefatigable gossip, a remarkable linguist, and an untiring letter writer. He had been on intimate terms with the leading politicians of several countries. But nothing sensational was discovered among the documents which filled his drawers. As to his relations with women, they appeared to have been promiscuous but superficial. He had many acquaintances among them, but few friends, and no one whom he loved. His habits were regular, his conduct inoffensive. His death was an absolute mystery and likely to remain so.

As to the arrest of John Mitton, the valet, it was a council of despair as an alternative to absolute inaction. But no case could be sustained against him. He had visited friends in Hammersmith that night. The alibi was complete. It is true that he started home at an hour which should have brought him to Westminster before the time when the crime was discovered, but his own explanation that he had walked part of the way seemed probable enough in view of the fineness of the night. He had actually arrived at twelve o’clock, and appeared to be overwhelmed by the unexpected tragedy. He had always been on good terms with his master. Several of the dead man’s possessions - notably a small case of razors - had been found in the valet’s boxes, but he explained that they had been presents from the deceased, and the housekeeper was able to corroborate the story. Mitton had been in Lucas’s employment for three years. It was noticeable that Lucas did not take Mitton on the Continent with him. Sometimes he visited Paris for three months on end, but Mitton was left in charge of the Godolphin Street house. As to the housekeeper, she had heard nothing on the night of the crime. If her master had a visitor he had himself admitted him.

So for three mornings the mystery remained, so far as I could follow it in the papers. If Holmes knew more, he kept his own counsel, but, as he told me that Inspector Lestrade had taken him into his confidence in the case, I knew that he was in close touch with every development. Upon the fourth day there appeared a long telegram from Paris which seemed to solve the whole question.