In 1806 the old prince was made one of the eight commanders in chief then appointed to supervise the enrollment decreed throughout Russia. Despite the weakness of age, which had become particularly noticeable since the time when he thought his son had been killed, he did not think it right to refuse a duty to which he had been appointed by the Emperor himself, and this fresh opportunity for action gave him new energy and strength. He was continually traveling through the three provinces entrusted to him, was pedantic in the fulfillment of his duties, severe to cruelty with his subordinates, and went into everything down to the minutest details himself. Princess Mary had ceased taking lessons in mathematics from her father, and when the old prince was at home went to his study with the wet nurse and little Prince Nicholas (as his grandfather called him). The baby Prince Nicholas lived with his wet nurse and nurse Savishna in the late princess' rooms and Princess Mary spent most of the day in the nursery, taking a mother's place to her little nephew as best she could. Mademoiselle Bourienne, too, seemed passionately fond of the boy, and Princess Mary often deprived herself to give her friend the pleasure of dandling the little angel- as she called her nephew- and playing with him.