eleven o'clock
He was wearing white mess uniform . The evening was warm and very still , and whenever the conversation died away , no sound save the monotonous note of the nightjars or the sudden cry of a barking-deer , broke the silence since the echoes of the `` Lights Out '' bugle call had died away among the hills . Wargrave looked at his watch . `` It 's past eleven o'clock , '' he said . `` I 'd no idea it was so late . I ought to get up and say goodnight ; but I 'm so comfortable here , Mrs. Dermot . '' His hostess smiled lazily at him but made no reply .