ten o'clock
`` But I did not get to sleep until just before day , and I was so exhausted I slept until noon . '' `` Let us waste no words , '' said the soft , round voice . `` I have waited long ; I am waiting still for ycur explanation . Why was that woman in your study alone with you last night at half-past ten o'clock ? '' `` You wish to know the whole truth ? '' `` I demand it . '' `` Very well , '' he replied deliberately .