She was to entertain Griselda Grantly, and, as far as might be possible, to induce her son to remain in Griselda's society.

The plan of the campaign was to be as follows:--Mrs.Grantly and the archdeacon were in the first place to go up to London for a month, taking Griselda with them; and then, when they returned to Plumstead, Griselda was to go to Lady Lufton.
This arrangement was not at all points agreeable to Lady Lufton, for she knew that Mrs.Grantly did not turn her back on the Hartletop people quite as cordially as she should do, considering the terms of the Lufton-Grantly family treaty.

But then Mrs.Grantly might have alleged in excuse the slow manner in which Lord Lufton proceeded in the making and declaring of his love, and the absolute necessity which there is for two strings to one's bow, when one string may be in any way doubtful.

Could it be possible that Mrs.Grantly had heard anything of that unfortunate Platonic friendship with Lucy Robarts?
There came a letter from Mrs.Grantly just about the end of March, which added much to Lady Lufton's uneasiness, and made her more than ever anxious to be herself on the scene of action, and to have Griselda in her own hands.

After some communications of mere ordinary importance with reference to the London world in general and the Lufton-Grantly world in particular, Mrs.Grantly wrote confidentially about her daughter:--"It would be useless to deny," she said, with a mother's pride and a mother's humility, "that she is very much admired.