“They didn’t trust Foss to play straight, sir. Brackley was quite open about that.”
“And it was Brackley’s idea? The parcel, I mean. It looks as if it came from his mint.”
“He said so, sir. Foss knew nothing about it, of course. It was a surprise for him. They knew he’d have to pretend he knew all about it when Marden brought it to him.”
“That finishes the parcel,” Sir Clinton continued. “But it had suggested one or two things, as you see. The most important thing, from my point of view, was that this gang was not exactly a band of brothers. Two of them suspected the third. Possibly the split was even more extensive.
“The next thing was the valet’s story. According to him, Maurice stabbed Foss, after a quarrel which Marden couldn’t overhear clearly. Unfortunately for that tale, the blow that killed Foss was a powerful one. What Marden didn’t know was that Maurice had sprained his wrist that morning. I doubt if a sprained wrist could have achieved that stab. There was no proof, of course; but it seemed just a little doubtful. Then Marden said that from the door he couldn’t catch the words of the quarrel, although the voices were angry in tone. I tried the experiment myself later; and it’s perfectly easy to overhear what’s said in the museum from the position Marden said he was in. So that was a deliberate lie. On that basis, one could eliminate most of Marden’s tale as being under suspicion.
“What really happened in the museum? Maurice is gone, Foss is dead, Marden won’t tell. One has just to reconstruct the thing as plausibly as one can. My impression—it’s only conjecture—is this. Marden was listening at the door and he could see some parts of the room, since the door was ajar. Foss had succeeded in substituting one replica for a real medallion. To get Maurice’s eye off him, he asked to see the Muramasa sword. Maurice went to get it, leaving Foss at his rubbing—visible to Maurice all the time. Foss made the exchange of the second replica at that moment. Maurice came back with the Muramasa sword—and of course in doing that, he put his finger-prints on the handle in drawing the blade from the sheath. Marden, at the door, saw him do this and made a note of it. Just as Maurice came back to Foss, he was suddenly taken ill. He had the third real medallion in one hand; and as he passed Foss he picked up the two replicas—which he believed to be the other two real medallions. He went to the safe and hurriedly put on a shelf the two replicas; but the other medallion, in his other hand, he forgot all about. He shut the safe and staggered into the secret passage.”
Inspector Armadale looked frankly incredulous.
“Do people take ill all of a sudden like that?” he demanded. “Why should he want to rush off all at once?”
Sir Clinton swung round on him.
“Ever suffered from rheumatism, Inspector? Or neuralgia? Or toothache?”