The Apostolic Colleges of Spanish America, as is well known, were spiritual powerhouses which provided learned, zealous and dynamic missionaries, who not only evangelized the pagan Indians on the periphery of Christianity but also renewed the faith and morals of the professed Christians in populous cities and far-flung haciendas. These missionaries were recruited principally from the provinces in Spain, though a number of American-born friars became members. It was but natural that in the course of time these colleges came to possess great archives and valuable libraries. The correspondence of the missionaries out in the conversiones, of bishops and government officials, the official books of the college, such as the Acta of the discretory, the reception and profession of novices, the account books, the affiliation and disaffiliation of members, the records of benefactors, all, after a century or two, comprised bulky archival material. Just as naturally, in the course of time, large libraries developed. Home missionaries needed access to general and particular knowledge without the constant necessity of leaving their colleges to obtain it. The missionaries in the Indian fields had to rely almost exclusively upon the college or mother house to supply them with the books they needed in fields where printing was unknown and reading was confined almost to the circle of missionaries.