anchor: What should there be? Then catching sight of Dorcas, the parlourmaid, going into the dining-room, she called to her to bring some stamps into the boudoir. 
positive: The parlourmaid Dorcas was caught sight of going into the dining room, then called to bring some stamps.
negative: The parlourmaid Dorcas wasn't there, as she had been fired a few months prior.