six o'clock
After a while he took Nancy to lunch once or twice , and one day took her to the Plaza , where his mother happened to be staying with Cousin Mary Winthrop and Cousin Anna Baldwin , and his mother said that Nancy was a sweet , lovely girl . Bert had quite a thrill when he saw the familiar , beautiful face turned seriously and with pretty concern toward his mother , and he liked Nancy 's composure among the rather formal older women . She managed her tea and her gloves and her attentions prettily , thought Bert . When he took her home at six o'clock he was conscious that he had passed an invisible barrier in their relationship ; she knew his mother . They were of one breed . But that night , when he went back to the hotel to dine , his mother drew him aside . `` Not serious , dear -- between you and Miss Barrett , I mean ? ''