“I beg your pardon! I beg your pardon!” interjected Mr. Cupples, laying down his knife and fork. “I was most careful, when we talked it all over the other night, to say nothing indicating such a belief. I was always certain that he was innocent.”
“You said something of the sort at Marlowe’s just now. I wondered what on earth you could mean. Certain that he was innocent! How can you be certain? You are generally more careful about terms than that, Cupples.”
“I said ‘certain,’ ” Mr. Cupples repeated firmly.
Trent shrugged his shoulders. “If you really were, after reading my manuscript and discussing the whole thing as we did,” he rejoined, “then I can only say that you must have totally renounced all trust in the operations of the human reason; an attitude which, while it is bad Christianity and also infernal nonsense, is oddly enough bad Positivism too, unless I misunderstand that system. Why, man—”
“Let me say a word,” Mr. Cupples interposed again, folding his hands above his plate. “I assure you I am far from abandoning reason. I am certain he is innocent, and I always was certain of it, because of something that I know, and knew from the very beginning. You asked me just now to imagine myself on the jury at Marlowe’s trial. That would be an unprofitable exercise of the mental powers, because I know that I should be present in another capacity. I should be in the witness-box, giving evidence for the defence. You said just now, ‘If there were a single piece of evidence in support of his tale.’ There is, and it is my evidence. And,” he added quietly, “it is conclusive.” He took up his knife and fork and went contentedly on with his dinner.
The pallor of sudden excitement had turned Trent to marble while Mr. Cupples led laboriously up to this statement. At the last word the blood rushed to his face again, and he struck the table with an unnatural laugh. “It can’t be!” he exploded. “It’s something you fancied, something you dreamed after one of those debauches of soda and milk. You can’t really mean that all the time I was working on the case down there you knew Marlowe was innocent.”
Mr. Cupples, busy with his last mouthful, nodded brightly. He made an end of eating, wiped his sparse moustache, and then leaned forward over the table. “It’s very simple,” he said. “I shot Manderson myself.”
“I am afraid I startled you,” Trent heard the voice of Mr. Cupples say. He forced himself out of his stupefaction like a diver striking upward for the surface, and with a rigid movement raised his glass. But half of the wine splashed upon the cloth, and he put it carefully down again untasted. He drew a deep breath, which was exhaled in a laugh wholly without merriment. “Go on,” he said.
“It was not murder,” began Mr. Cupples, slowly measuring off inches with a fork on the edge of the table. “I will tell you the whole story. On that Sunday night I was taking my before-bedtime constitutional, having set out from the hotel about a quarter past ten. I went along the field path that runs behind White Gables, cutting off the great curve of the road, and came out on the road nearly opposite that gate that is just by the eighth hole on the golf-course. Then I turned in there, meaning to walk along the turf to the edge of the cliff, and go back that way. I had only gone a few steps when I heard the car coming, and then I heard it stop near the gate. I saw Manderson at once. Do you remember my telling you I had seen him once alive after our quarrel in front of the hotel? Well, this was the time. You asked me if I had, and I did not care to tell a falsehood.”
A slight groan came from Trent. He drank a little wine, and said stonily, “Go on, please.”
“It was, as you know,” pursued Mr. Cupples, “a moonlight night, but I was in shadow under the trees by the stone wall, and anyhow they could not suppose there was anyone near them. I heard all that passed just as Marlowe has narrated it to us, and I saw the car go off towards Bishopsbridge. I did not see Manderson’s face as it went, because his back was to me, but he shook the back of his left hand at the car with extraordinary violence, greatly to my amazement. Then I waited for him to go back to White Gables, as I did not want to meet him again. But he did not go. He opened the gate through which I had just passed, and he stood there on the turf of the green, quite still. His head was bent, his arms hung at his sides, and he
