Among the latter were the twelve scribes, who sat in the nave for the service of the illiterate public, and were sworn to do nothing detrimental to the interests of the Chapter. The Apostle's mass was sung the first thing in the morning, in earlier days by a Vicar Choral, and subsequently by a Petty Canon; and next came the two masses named after the Virgin and the Chapter, the Cardinals taking the latter. The other daily services were the usual Nocturns or Matins and the rest, ending with a combined evensong of Vespers and Compline. We do not know how the old Use of St. Paul's differed from that of Sarum. Besides the Conversion and Commemoration of St. Paul, the Deposition (April 30th) and the Translation (November 14th) of St. Erkenwald were red-letter days when, before the peal was sounded, the bells were rung two and two. On the eve of St. Nicholas (December 5th), patron saint of children, the choristers elected their boy bishop and his clerks. On St. John the Evangelist's Day (December 27th) at evensong the newly elected boy bishop in pontifical vestments, with his boy clerks in copes, walked in procession, and after censing the altar of the Blessed Trinity returned and occupied dignitaries' stalls, and any evicted dignitary had to take the boy's place as thurifer or acolyte, the boy bishop giving the benediction. The next day (Holy Innocents) this youth preached and took the earlier part of the mass. These choir lads were trained to act mysteries and, later on, stage plays.[20] [Illustration: THE SHRINE AND ALTAR OF ST. ERKENWALD BEHIND THE HIGH ALTAR. _After Hollar._]