twelve o'clock
He had that peculiar gaol instinct . `` Then you must stay in and finish another page of composition , '' said the teacher . This was against her usual sense of justice , and the boy resented it derisively . At twelve o'clock she caught him slinking out . `` Williams , sit down , '' she said . And there she sat , and there he sat , alone , opposite to her , on the back desk , looking up at her with his furtive eyes every minute . `` Please , miss , I 've got to go an errand , '' he called out insolently .