eleven o'clock
`` I do not care very much for Belgians , as a rule , but the Van Drissels are exceptionally nice people . '' Dennis said nothing , but he had his own thoughts . He did not like mademoiselle 's bright black eyes , and the lieutenant 's perpetual smile had begun to get on his nerves . Mrs. Dashwood had kept up very bravely , though her heart was sad enough in all conscience , and when eleven o'clock struck , and Dennis , who had been living at high pressure , suddenly yawned and said : `` Would you mind , mater , if I turned in ? I 'm as tired as a dog . '' Mrs. Dashwood made no demur , but signed to her eldest son to remain a little longer . `` Come into the drawing-room , Bob , '' she said , when they heard Dennis close his bedroom door with a bang .