To quiet its religious scruples the government hit upon the device of requiring the baptism of all pagan slaves upon their disembarkation in the colonial ports.
The crown was clearly not prepared to withstand a campaign for supplies direct from Africa, especially after the accession of the youth Charles I in 1517.

At that very time a clamor from the islands reached its climax.
Not only did many civil officials, voicing public opinion in their island communities, urge that the supply of negro slaves be greatly increased as a means of preventing industrial collapse, but a delegation of Jeronimite friars and the famous Bartholomeo de las Casas, who had formerly been a Cuban encomendero and was now a Dominican priest, appeared in Spain to press the same or kindred causes.

The Jeronimites, themselves concerned in industrial enterprises, were mostly interested in the labor supply.

But the well-born and highly talented Las Casas, earnest and full of the milk of human kindness, was moved entirely by humanitarian and religious considerations.

He pleaded primarily for the abolition of the encomienda system and the establishment of a great Indian reservation under missionary control, and he favored the increased transfer of Christian negroes from Spain as a means of relieving the Indians from their terrible sufferings.
The lay spokesmen and the Jeronimites asked that provision be made for the sending of thousands of negro slaves, preferably bozal negroes for the sake of cheapness and plenty; and the supporters of this policy were able to turn to their use the favorable impression which Las Casas was making, even though his programme and theirs were different.[12] The outcome was that while the settling of the encomienda problem was indefinitely postponed, authorization was promptly given for a supply of bozal negroes.
[Footnote 12: Las Casas, _Historio de las Indias_ (Madrid, 1875, 1876); Arthur Helps, _Life of Las Casas_ (London, 1873); Saco, _op.cit_., pp.
62-104.] The crown here had an opportunity to get large revenues, of which it was in much need, by letting the slave trade under contract or by levying taxes upon it.