The white face resumed a little of its colour and the teeth ceased to chatter as the potent spirit got in its work. With an uneasy swagger, Dashwood crossed over to the door, but his heart was beating thick and fast and there was a great lump in his throat that he could not quite succeed in swallowing. But the inspector of police knew nothing of this as he responded curtly enough to Dashwood's insolent salutation.

"And what can I do for you?" the latter asked. "This is a very inconvenient hour for me."

"Very sorry for that, sir," the official said coolly. "But my duty is plain. I should like to have a few words with you as to the fire at Dashwood Hall."

A strange sense of relief, almost of exultation, came over the listener. He could breathe more freely now; all his swagger came back to him. The visit of the officer had nothing to do with any episode out of a dark and dubious past.

"What can I tell you about that?" he asked. "I know nothing of it."

"Well, it's like this, sir," Drake proceeded to explain. "We have established beyond all shadow of a doubt that the fire was not caused by accident. Straw was laid deliberately on the floor of the hall, and as deliberately soaked in petroleum. We found the rest of the straw, and also we found the empty drum of oil, which had been taken from one of the outhouses. All this must have happened in the early hours of the morning. It was a very good thing that the timbers of the house are so sound, or nothing could have saved the place. As it is, the fire burnt itself out."

"But what has all this got to do with me?" Dashwood asked impatiently.

"Half a minute, sir. I was merely telling you that this was the work of an incendiary. Once having established the fact, we will get to business. We searched in the ashes, and we were so fortunate as to find this."

Drake held up the familiar matchbox and handed it to Dashwood. He looked just a little uneasy, but there was no suggestion of guilt about him.

"We found this peculiar matchbox in the straw, sir," Drake went on. "The theory is that it was dropped by somebody who was connected with the fire. Suppose that the culprit was disturbed, or perhaps the sudden blaze was so fierce that the box fell and could not be recovered. I want to know if you have seen this box before?"