Bonaventure relates that when the order had greatly increased, St. Francis had a vision which determined him to reduce the rule to a shorter form. Francis, with Brother Leo and Brother Bonizo of Bologna, went in 1223 to Fonte Colombo, a beautiful wood-covered hill near Rieti, where, fasting on bread and water, he caused the rule to be written down by Brother Leo. Brother Elias, to whom this rule was entrusted, after a few days declared that he had lost it, hence Francis had the rule rewritten. The rule composed in 1223 was solemnly confirmed by the Bull "Solet annuere" of Honorius III of 29 November 1223. The rule of 1223 is the Franciscan Rule properly so called, the rule which the Friars Minor still observe. It is named by Franciscan authors "Regula bullata" or "Regula secunda." From what has been already said, it may be gathered that St. Francis successively developed his rule, adapting it to the circumstances. Those who believe in an influence exercised on St. Francis in recasting the third rule the point that Pope Gregory IX, in the Bull "Quo elongati" (1230), says that he knew the intention of St. Francis with regard to the rule, as he had assisted him when he wrote it and obtained its confirmation. The rule is contained in the Bull "Solet annuere," and begins with these characteristic words: "The rule and life of the Minor Brothers is this, namely, to observe the holy Gospel of our Lord Jesus Christ by living in obedience, without property and in chastity." St. Francis promises obedience to Pope Honorius and his successors, the other brothers are to obey Brother Francis and his successors (c. i). Having thus laid the solid foundation of unity upon the Church, St. Francis gives particulars concerning reception, profession, and vestments of the brothers. They are forbidden to wear shoes, if not compelled through necessity (c. ii). Chapter the third prescribes for the clerics "the Divine Office according to the order of the holy Roman Church, with the exception of the Psalter; wherefore (or, as soon as) they may have breviaries." The laybrothers have to say Paternosters, disposed according to the canonical hours. The brothers are to "fast from the feast of All Saints until the Nativity of the Lord," during Lent, and every Friday. The forty days' fast (obligatory in the rule of 1221), which begins Epiphany, is left free to the good will of the brothers.