ten o'clock
A half an hour for rest and recreation followed the supper . Then the bell rang for a study period of two hours . At the end of this time work was over for the day , and the boys sought their dormitories to do as they chose till bedtime . All lights were to be out by ten o'clock . The boys came into Number Three with a clatter and a bang . When they were all there , Melvin lifted his hand to hush the racket . `` Hi , there , you fellows , '' he shouted .