"You don't mean to tell me you have struck a clew?"
"I believe I can lay hands upon the criminal," said Langholm, as quietly as he could. But he was the more nervous man of the two.
The other simply stood still and stared his incredulity. The stare melted into a smile. "My dear fellow!" he murmured, in a mild blend of horror and reproof, as though it were the fourth dimension that Langholm claimed to have discovered. It cost the discoverer no small effort not to cry out that he could lay hands on him then and there. The unspoken words were gulped down, and a simple repetition substituted at the last.
"I could swear to him myself," added Langholm. "It remains to be seen whether there is evidence enough to convict."
"Have you communicated with the police?"
"Not yet."
"They seem to have some absurd bee in their helmet down here, you know."
"They don't get it from me."
It was impossible any longer to doubt the import of Langholm's earnest and rather agitated manner. He was doing his best to suppress his agitation, but that strengthened the impression that he had indeed discovered something which he himself honestly believed to be the truth. There was an immediate alteration in the tone and bearing of his host.
"My dear fellow," he said, "forgive my levity. If you have really found out anything, it is a miracle; but miracles do happen now and then. Here's the pond, and there's the boathouse behind those rhododendrons. Suppose you tell me the rest in the boat? We needn't keep looking over our shoulders in the middle of the pond!"