“The barrel! That’s the ticket.” Merriman was excited in his turn. “That is, if it has a lid.”

They retraced their steps. With the tank they did not trouble; it was a galvanized iron box with the lid riveted on, and moreover was full of oil; but the barrel looked feasible.

It was an exceptionally large cask or butt, with a lid which projected over its upper rim and which entirely protected the interior from view. It was placed in the corner beside the right hand gable of the shed, that is, the opposite end of the manager’s rooms, and the wooden down spout from the roof passed in through a slot cut in the edge of the lid. A more ideal position for an observation post could hardly have been selected.

“Try to lift the lid,” whispered Hilliard.

They found it was merely laid on the rim, cleats nailed on below preventing it from slipping off. They raised it easily and Hilliard flashed in a beam from his electric torch. The cask was empty, evidently a result of the long drought.

“That’ll do,” Merriman breathed. “That’s all we want to see. Come away.”

They lowered the cover and stood for a moment. Hilliard still wanted to try the doors of the shed, but Merriman would not hear of it.

“Come away,” he whispered again. “We’ve done well. Why spoil it?”

They returned to the boat and there argued it out. Merriman’s proposal was to try to find out when the Girondin was expected, then come the night before, bore a few eyeholes in the cask, and let one of them, properly supplied with provisions, get inside and assume watch. The other one would row away, rest and sleep during the day, and return on the following night, when they would exchange roles, and so on until the Girondin left. In this way, he asserted, they must infallibly discover the truth, at least about the smuggling.

“Do you think we could stand twenty-four hours in that barrel?” Hilliard questioned.