According to Fray Toribio de Benavente Motolinia, the number of baptized Indians in Mexico in 1536 was five million. The multitude of Indians who asked for baptism, said to have greatly increased after the apparition of Our Lady of Guadalupe in 1531, forced the missionaries to adopt a special form for administering this sacrament. The catechumens were arranged in order, with children in front. Prayers were recited in common over all, salt, saliva, etc., applied to a few, and then water was poured on the head of each without using the customary holy oils or chrism. The practice faced no opposition while the Franciscans were in charge of the missions, but as soon as members of other religious orders and some secular ecclesiastics arrived, doubt began to be cast upon the validity of these baptisms. To put an end to the dispute Bishop Zumárraga submitted the case to Rome, and on June 1, 1537, Pope Paul III issued the bull "Altitudo divini consilii", which declared that the friars had not sinned in administering baptism in this form, but decreed that in the future it should not be thus administered except in cases of urgent need.