"Where is your master?" he demanded.

"In there," Cotter whispered, "with them. He'll never come out again. We shall never see Samuel Flower alive. What are you going to do, sir? You wouldn't be as mad as that."

"I am going into the library," Wilfrid said curtly. As he spoke he laid his hand upon the knob, but the key was turned inside and he could make no approach. Cotter caught him round the shoulders.

"Don't do it," he whispered. "If you value your life stay where you are. And besides, it is too late to do any good. He has been locked in there with them five minutes. And five minutes with them is eternity."

Cotter's voice broke off suddenly as a feeble cry came from within the room. Wilfrid stepped back a pace or two.

"Stand clear," he said, "I am going to burst the door."

CHAPTER X

"MR. WIL——"

Wilfrid brushed Cotter aside as if he had been a fly, and flung himself against the door, heedless of its weight and strength, but it was of stout oak and he might as well have hurled himself against a brick wall. But the sullen blow echoed through the house and there were indications of alarm and confusion in the library. It was useless to bruise himself against the obstacle and Wilfrid looked hastily around for some weapon. His eyes fell upon a trophy of bill-hooks and battleaxes. He snatched one of the latter and attacked the door in earnest. The third blow smashed in a panel and a crossbar so that it was possible to crawl through into the library.

As far as he could see the place was empty. One of the windows was wide open, which was perhaps fortunate, for the overpowering scent hung on the air and the odour of it was keen upon Wilfrid's nostrils. Beyond doubt one of those mysterious fireballs had been lighted here. But there was no time to inquire into this. What had become of Samuel Flower? He must have been there a few minutes ago. Certainly somebody had been in the library. Flower's peril now seemed as great as ever. Wilfrid strode across towards the window past the mahogany writing-table where Flower's letters were scattered about. One letter with little more than a name and address lay on the blotting pad with a wet pen upon it, as if it had fallen suddenly from the writer's hand. Eager and excited as he was, Wilfrid noted this casually. His search was finished now. As he strode past the table he blundered over a figure lying at his feet which he recognized at once as that of Samuel Flower. He had to call twice, and the second time sternly, before Cotter wriggled through the broken panel and came dazed and frightened into the room.