twelve
o'clock
`` Did n't you hear the noise of footsteps in the garden ? '' said M. Formery . `` One ca n't hear anything that happens in the garden from our bedroom , '' said the concierge . `` Even the night when Mlle. Germaine 's great Dane barked from twelve o'clock till seven in the morning , all the household was kept awake except us ; but bless you , sir , we slept like tops , '' said his wife proudly . `` If they sleep like that it seems rather a waste of time to have gagged them , '' whispered the Duke to the inspector . The inspector grinned , and whispered scornfully , `` Oh , them common folks ; they do sleep like that , your Grace . '' `` Did n't you hear any noise at the front door ? ''