But Mr. Tombs's careworn face had the innocence of a patient sheep's.
"Just something I was thinking, Mr. Lucek," he said.
Benny grinned his expansive display of pearly teeth, and continued with his packing. Mr. Tombs's gaze continued to concentrate on him with an almost mesmeric effect; but Benny was not disturbed. He had spent nearly an hour that morning making and testing his preparations. The upper sash-cords of the window behind Mr. Tombs's chair had been cut through all but the last thread, and the weight of the sash was carried on a small steel peg driven into the frame. From the steel peg a thin but very strong dark-coloured string ran down to the floor, pulleyed round a nail driven into the base of the wainscoting, and disappeared under the carpet; it pulleyed round another nail driven into the floor under the table, and came up through a hole in the carpet alongside one leg to loop conveniently over the handle of the drawer.
Benny completed the knots around his parcel, and searched around for something to trim off the loose ends.
"There you are, Mr. Tombs," he said and then, in his fumbling, he caught the convenient loop of string and tugged at it. The window fell with a crash.
And Mr. Tombs did not look around.
It was the most flabbergasting thing that had ever happened in Benny Lucek's experience. It was supernatural — incredible. It was a phenomenon so astounding that Benny's mouth fell open involuntarily, while a balloon of incredulous stupefaction bulged up in the pit of his stomach and cramped his lungs. There came over him the feeling of preposterous injury that would have assailed a practised bus-jumper who, preparing to board a moving bus as it came by, saw it evade him by rising vertically into the air and soaring away over the housetops. It was simply one of the things that did not happen.
And on this fantastic occasion it happened. In the half-opened drawer that pressed against Benny's tummy, just below the level of the table and out of range of Mr. Tombs's glassy stare, was another brown paper parcel exactly similar in every respect to the one which Benny was finishing off. Outwardly, that is. Inside, there was a difference; for whereas inside the parcel which Benny had prepared before Mr. Tombs's eyes there were undoubtedly two thousand authentic one-pound notes, inside the second parcel there was only a collection of old newspapers and magazines cut to precisely the same size. And never before in Benny's career, once the fish had taken the hook, had those two parcels failed to be successfully exchanged. That was what the providentially falling window was arranged for, and it constituted the whole simple secret of the green goods game. The victim, when he got home and opened the parcel and discovered how he had been swindled, could not make a complaint to the police without admitting that he himself had been ready to aid and abet a fraud; and forty-nine times out of fifty he would decide that it was better to stand the loss and keep quiet about it. Elementary, but effective. And yet the whole structure could be scuppered by the unbelievable apathy of a victim who failed to react to the stimulus of a loud bang as any normal human being should have reacted.
"The — the window seems to have fallen down," Benny pointed out hoarsely; and felt like a hero of a melodrama who has just shot the villain in the appointed place at the end of the third act, and sees him smilingly declining to fall down and die according to the rehearsed script.
"Yes," agreed Mr. Tombs cordially. "I heard it."