The president was empowered to delegate the oidores, in turn, to make tours of inspection in the provinces. The magistrates, as visitors, were to inquire into the character of service rendered by the alcaldes mayores in the administration of government and justice. They were to note the state of the towns and their needs, the means taken for the construction and preservation of public buildings, and the condition of the Indians on the encomiendas. They were to see whether they were faithfully and efficiently instructed in religion, or whether they were permitted to live in ignorance and idolatry. Reports were to be made by the visitors on the state of the soil, the condition of the crops and harvests, extent of mineral wealth and timber in the provinces under investigation, weights and measures, and in fact, everything that had to do with the general welfare. On these trips the oidores were authorized to take such action as they felt to be necessary. Two oidores were also required to make weekly inspections of the prisons of the colony. The decree of establishment also directed that certain phases of ecclesiastical affairs should claim the attention of the audiencia. The chief duty of the tribunal in that regard was to keep the ecclesiastical judges from exceeding their authority, and the practices of the audiencias of Spain were especially prescribed as a precedent for the local tribunal. The audiencia was charged with supervision over the assignment of benefices, and especially with the settlement of the property and estates of bishops and archbishops who died in the Islands. The audiencia was ordered to permit nothing to be done which would be in prejudice of the rights and prerogatives of the church. The tribunal was instructed to assist the prelates on all occasions when they petitioned for royal aid. It was also to see that properly accredited bulls were read and applied in the Spanish towns, but not in the native villages.