Tufnell was recalled to the room, and, in reply to Superintendent Merrington's question, stated that none of the guests left the dining-room before the shot was fired. Tufnell added they were all interested in listening to a story that Mr. Musard was telling. Having imparted this information the butler returned to the breakfast room, overweighted with the responsibility of superintending the morning meal in his mistress's absence.

"Is this Musard the jewel expert of that name?" asked Merrington.

"Our guest is Mr. Vincent Musard, the explorer," replied Miss Heredith coldly.

"The same man." Merrington made another minute note in his pocket-book, and continued, "May I take it, then, that all your guests who were staying here were assembled in the dining-room at the time the murder was committed?"

"Yes; except one who left during the afternoon."

"Who was that?"

"Captain Nepcote, a friend of my nephew's. He received a telegram recalling him to the front, and returned to London by the afternoon train."

Merrington made a note of this in his pocket-book with an air of finality, and asked Miss Heredith to see that the servants were sent to the library one by one, to be questioned. Miss Heredith said she would arrange it with the housekeeper, and was then politely escorted to the door by Captain Stanhill.

The next few hours were educative for Captain Stanhill. Although he was Chief Constable of Sussex, he took no part in the proceedings, but sat at the table like a man in a dream, living in a world of Superintendent Merrington's creation—a world of sinister imaginings and vile motives, through which stealthy suspicion prowled craftily with padded feet, seeking a victim among the procession of weeping maids, stolid under-gardeners, stable hands, and anxious upper servants who presented themselves in the library to be questioned. But it seemed to Captain Stanhill that though the women were flustered and the men nervous, they knew nothing whatever about the atrocious murder which had been committed a few hours before in the room above their heads. Merrington also seemed to be aware that he was getting no nearer the truth with his traps, his questions, and his bullying, and he grew so angry and savage as the day wore on that he reminded Captain Stanhill of a bull he had once seen trying to rend a way through a mesh. As the morning advanced, Merrington's face took on a deeper tint of purple, his fierce little eyes grew more bloodshot, and between the intervals of examining the servants he mopped his perspiring head with a large handkerchief.

The significance of one fact he did not realize until afterwards. The last of the inmates of the moat-house to come to the library was the housekeeper, Mrs. Rath, who presented herself at his request in order to acquaint him with the details of the domestic management of the household. Mrs. Rath entered the room with a nervous air. Her white face contrasted oddly with her black dress, and her hands shook slightly, in spite of her effort to appear composed. Merrington stared at her careworn face and hollow grey eyes with the perplexed sensation of a man who is confronted with a face familiar to him, but is unable to recall its identity.