"There's not a tree in this wood I don't remember," he said, looking about him as we scrambled up the bridle path. Bracken up to our waists was on both sides, and it grew and hung over so thickly that the path was barely visible. As we reached the top of the track he gave a low whistle. Instantly the whistle was answered. A moment later half a dozen men rose up out of the undergrowth.

At the foot of a clump of pine trees in the middle of the wood, we lay down to confer. Then it was I learned, for the first time, something of the line of action the police had decided to adopt.

Forty police officers in various disguises, the majority dressed to look like the tenantry in their holiday clothes, were, it seemed, concealed in the various covers, in addition to a dozen disguised as labourers, stationed in fields beside the roads leading to Eldon Hall.

Besides these were fifteen officers, guests to all appearance, who would arrive with the other guests and mingle with them freely. There were also eight men disguised as hired waiters, who would help the servants below stairs in the Hall, and five female detectives assisting the maids in their work.

"You've got the revolver I gave you?" the gamekeeper's son said, turning to me suddenly. His name, he had told me, was Ross.

"Yes, though I all but forgot it."

"Let me see it," he said.

I produced it from my pocket, and handed it over.

"I thought so!" he exclaimed. "Not loaded." He loaded it with the cartridges I gave him, then gave it back to me.

Half an hour passed. One by one the men had risen and wandered away. Now only three remained. Ten minutes later two more rose and went, leaving me alone with Ross. His reminiscences of game-keepinga calling he seemed still to loveand of the former Lord Cranmere and his relations and his friends, also his experiences during the eighteen years he had been in the police force, were interesting to listen to. Brighter and brighter the sun shone. The weather was almost spring-like and no breath of wind stirred. Half a mile or so away, in the valley far beneath us, well-dressed men and women sauntered in the gardens and out upon the lawns. Larger and larger grew the number of these guests. From varying distances came the sound of cars rapidly approaching. In the broad, flat meadow, far down to our right, sports of different sorts were in progress. Beyond them were swings and similar attractions where children in their hundreds thronged and clustered. In all directions flew flags and bunting, while the sharp reports of the shooting-gallery rifles were audible above the blare of the roundabouts' steam organs.