Dunstan's retirement at Canterbury consisted of long hours, both day and night, spent in private prayer, as well as his regular attendance at Mass and the daily office. He visited the shrines of St Augustine and St Æthelberht, and there are reports of a vision of angels who sang to him heavenly canticles. He worked to improve the spiritual and temporal well-being of his people, to build and restore churches, to establish schools, to judge suits, to defend widows and orphans, to promote peace, and to enforce respect for purity. He practised his crafts, made bells and organs and corrected the books in the cathedral library. He encouraged and protected European scholars who came to England, and was active as a teacher of boys in the cathedral school. On the vigil of Ascension Day 988, it is recorded that a vision of angels warned he would die in three days. On the feast day itself, Dunstan said Mass and preached three times to the people: at the Gospel, at the benediction, and after the Agnus Dei. In this last address, he announced his impending death and wished his congregation well. That afternoon he chose the spot for his tomb, then went to his bed. His strength failed rapidly, and on Saturday morning, 19 May, he caused the clergy to assemble. Mass was celebrated in his presence, then he received Extreme Unction and the Viaticum, and died. Dunstan's final words are reported to have been, "He hath made a remembrance of his wonderful works, being a merciful and gracious Lord: He hath given food to them that fear Him."