It was Brother Isadore's night on duty. He walked slowly up and down the range of the dormitories until every boy seemed ready to get into bed, then he put out all the candles (there was no gas to be had and the Brothers would not trust coal-oil lamps to boys). So long as they were under surveillance, the boys observed the utmost quiet and decorum. All continued in order until Brother Isadore passed out through the lavatory, one of the boys following him as a scout, had seen the last glimmer of his hand-lamp disappear around the corner at the foot of the staircase, and heard the library door close behind him.