midnight
Finally , I called softly over my shoulder to Daphne , but she did not hear . Instead , the shadow disengaged itself , moved forward and resolved into Bagsby , Daphne 's chauffeur . `` I was n't sure at first that you saw me , Miss , '' he said , touching his cap . `` It 's my turn until midnight ; Clarkson ` as it until three , and the gardener until daylight . '' `` Good gracious ! '' I gasped . `` Do you mean you are guarding the house ? ''