It was perhaps an hour later that he came back to a realization of a gnawing desire. He wanted a pipe, and the need was an insistent one. It was of no use to argue with himself. He surely had to have one smoke. Longingly he fingered his pipe, filled it casually with the loose tobacco in his coat pocket, and balanced the pros and cons in his mind. From behind the window curtain he examined the plaza.
"Not a soul in sight. Don't believe there's a man about the place. No risk at all, looks to me."
With that, he swept the match to a flame, and lit the pipe. He sat close to the open window, so that the smoke could drift out without his being seen.
The experiment brought no disaster. He finished his smoke undisturbed, and went back to reading.
The hours dragged slowly past. Noon came and went; mid-afternoon was upon him. His watch showed a few minutes past four when he decided on another smoke. From the corner of his pocket he raked the loose tobacco into the bowl of his pipe, and pressed it down. Presently he was again puffing in pleasant serenity.
Suddenly there came a blinding flash and a roar.
Buck started to his feet in amazement, the stem of the pipe still in his mouth, the bowl shattered into a hundred bits. His first thought was that he had been the target for a sharpshooter. There was a neat hole through the framework of the window case, showing where the bullet had plowed. But an investigation left him in the air; for the direction of the bullet hole was such that, if anybody from outside had fired it, he must have been up in a balloon.
The explanation came to him like a flash. In raking the tobacco into his pipe with his fingers, he must have pressed into the bowl a stray cartridge left some time in the pocket. This had gone off after the heat had reached the powder.
By the time he had reached this conclusion some one came running along the passage and tried the locked door. After some rattling at the knob, the footsteps retreated. Buck could hear excited voices.
"Coming back in force, I'll bet," he told himself, with a dubious grin.