 In 1243 the Tuscan hermits petitioned Pope Innocent IV to unite them all as one group.Innocent IV issued the Bull "Incumbit Nobis" on 16 December 1243, an essentially pastoral letter which exhorted these hermits to adopt "the "Rule" and way of life of the Blessed Augustine," to profess this Augustinian manner of life in a way that they themselves would decide with regards to a specific charism and apostolate, and to elect a Prior General.The bull also appointed Cardinal Riccardo Annibaldi as their supervisor and legal guide.