"Say, boy, we're old friends. I ain't out to do you a hurt. All I need is to try and worry out that code and know things. If I was sure of being able to read it, why, this five hundred would be five thousand, and worth it all to me, every cent of it. If I can't read that code, then I'll just hand you back my copy, and no harm's done. See? I tell you I wouldn't hurt you for more than the money I hope to make. Is it a bet?"

Steve passed out through the barrier and turned the key in the door. Then he came back.

"I'll take that money."

"Good."

Peter paid it over, and then watched the other as he took the original message which Slosson had written off a file and laid it on the table beside a blank form.

"Say, be as sharp as you can over it," Steve said urgently. Then he passed into the inner room and closed the door.

The interior of Mike Callahan's livery barn was typical of a small prairie town. Rows of horse-stalls ran down either side of it, from one end to the other. At the far end sliding doors opened out upon an enclosure, round which were the sheds sheltering a widely varied collection of rigs and buggies. Also here there was further accommodation for horses. Just inside the main barn, to the left, the American Irishman had two small rooms. The one at the front, with its window on Main Street, was his office. Behind this, dependent for light upon a window at the side of the building, was a harness-room crowded with saddles and harness of every description, also a bunk on which Mike usually slept when he kept the barn open at night.

It was late at night now, about midnight on the day following Peter McSwain's momentous effort with Steve Mason. Four men were gathered together in profound council in Mike's harness-room. The atmosphere of the place was poisonous. A horse blanket obscured the window, and the door was shut and locked, although the barn itself was closed for the night, and there was small enough chance of intrusion. Still, every precaution had been taken to avoid any such contingency.

A single guttering candle stuck in the neck of a black bottle illumined the intent faces of the men. Gordon was sitting at a small table with a sheet of paper in front of him and a small morocco-bound book beside it. Silas Mallinsbee and Peter McSwain were sitting upon Mike Callahan's emergency bunk, while the owner of it contented himself with an upturned bucket near the door. Cigar-smoke clouded the room and left the atmosphere choking, but all of them seemed quite impervious to its inconvenience.

For awhile there was no other sound than the rustle of the leaves of Gordon's book and the scratching of the indifferent pen he had borrowed from Mike. Then, after what seemed interminable minutes, he looked up from his task with a transparent smile.