Feria in the Octaves of St Wilfrid of York, & of St Edward, King & Confessor; Commemoration of St Heron of Antioch, Bishop & Martyr: Missa “Sacerdotes tui” St Wilfrid spread the knowledge of the Benedictine Rule, brought religious treasures from the Continent, and helped improve the chanting of the liturgy. He was a great builder at York,…