ten o'clock
Presently , having exhausted his vocabulary on his room-mate , Tim went . Don settled his head in his hands and studied the numbered diagram for the better part of an hour . Don was slow at memorising , but what was once forced into his mind stayed there . A little before ten o'clock he slipped the diagram under a box in a bureau drawer and went to bed with a calm mind , and when Tim returned riotously a few minutes later Don was sleeping peacefully . On Monday , in chapel , Don and the `` heroes '' of Farmer Corrigan 's conflagration had another shock , and Don , for one , wondered when he was to hear the last of that affair . `` Since last week , '' said Mr. Fernald drily , `` when I requested the four boys who helped to put out a fire at the Corrigan farm to make themselves known to an admiring public , I have gained an understanding of their evident desire to conceal their identities . I am forced to the conclusion that it was not altogether modesty that kept them silent .