Thus persuaded I drained my ale, and together we went down to the ferry, landing at Kew Gardens, and crossing them until we emerged by the Unicorn Gate, almost opposite the house.

There were loiterers still outside, men, women, and children, who lounged in the vicinity, staring blankly up at the drawn blinds. A constable in uniform admitted us. He had his lunch, a pot of beer and some bread and cheese which his wife had probably brought him, on the dining-room table, and we had disturbed him with his mouth full.

He was the same man whom Ambler Jevons had seen in the morning, and as we entered he saluted, saying:

“Inspector Thorpe has left a message for you, sir. He’ll be back from the Yard about half-past three, and would very much like to see you.”

“Do you know why he wants to see me?”

“It appears, sir, that one of the witnesses who gave evidence this morning is missing.”

“Missing!” he cried, pricking up his ears. “Who’s missing?”

“The manservant, sir. My sergeant told me an hour ago that as soon as the man had given evidence he went out, and was seen hurrying towards Gunnersbury Station. They believe he’s absconded.”

I exchanged significant glances with my companion, but neither of us uttered a word. Ambler gave vent to his habitual grunt of dissatisfaction, and then led the way upstairs.

The body had been removed from the room in which it had been found, and the bed was dismantled. When inside the apartment, he turned to me calmly, saying: