The man smiled. He seemed a superior type to the others and was evidently a foreman.

“Not so bad, monsieur. We have four saws, but only two are running today.” He pointed to the door behind him as he spoke, and the two friends passed in as if to have an idle look round.

The interior was fitted up like that of any other sawmill, but the same element of design and efficiency seemed apparent here as elsewhere. The foreman explained the process. The lopped trunks from the wood came in by one of two roads through a large door in the center of the building. Outside each road was a saw, its axle running parallel to the roads. The logs were caught in grabs, slung on to the table of the saws and, moving automatically all the time, were cut into lengths of from seven to ten feet. The pieces passed for props were dumped on to a conveyor which ran them out of the shed to be stacked for seasoning and export. The rejected pieces by means of another conveyor moved to the third and fourth saws, where they were cut into blocks for firewood, being finally delivered into two large bins ready for loading on to the lorries.

The friends exhibited sufficient non-technical interest to manage to spend a good deal of time over their survey, drawing out the foreman in conversation and seeing as much as they could. At one end of the shed was the boiler house and engine room, at the other the office, with between it and the mill proper a spacious garage in which, so they were told, the six lorries belonging to the syndicate were housed. Three machines were there, two lying up empty, the third, with engine running and loaded with blocks, being ready to start. They would have liked to examine the number plate, but in the presence of the foreman it was hardly possible. Finally they walked across the clearing to where felling and lopping was in progress, and inspected the operations. When they left shortly after with a promise to return to meet Mr. Coburn, there was not much about the place they had missed.

“That business is just as right as rain,” Merriman declared when they were once more in the boat. “And that foreman’s all right too. I’d stake my life he wasn’t hiding anything. He’s not clever enough for one thing.”

“So I think too,” Hilliard admitted. “And yet, what about the game with the number plates? What’s the idea of that?”

“I don’t know. But all the same I’ll take my oath there’s nothing wrong about the timber trade. It’s no go, Hilliard. Let’s drop chasing wild geese and get along with our trip.”

“I feel very like it,” the other replied as he sucked moodily at his pipe. “We’ll watch for another day or so, and if we see nothing suspicious we can clear out.”

But that very evening an incident occurred which, though trifling, revived all their suspicions and threw them at once again into a sea of doubt.

Believing that the Coburns would by that time have returned, they left the launch about five o’clock to call. Reaching the edge of the clearing almost directly behind the house, they passed round the latter and rang.