[Footnote 1: Bourne, _Spain in America_, p. 241; and _The Penn. Mag. of History_, xii., 265.] Many early advocates of slavery favored the enlightenment of the Africans. That it was an advantage to the Negroes to be brought within the light of the gospel was a common argument in favor of the slave trade.[1] When the German Protestants from Salsburg had scruples about enslaving men, they were assured by a message from home stating that if they took slaves in faith and with the intention of conducting them to Christ, the action would not be a sin, but might prove a benediction.[2] This was about the attitude of Spain. The missionary movement seemed so important to the king of that country that he at first allowed only Christian slaves to be brought to America, hoping that such persons might serve as apostles to the Indians.[3] The Spaniards adopted a different policy, however, when they ceased their wild search for an "El Dorado" and became permanently attached to the community. They soon made settlements and opened mines which they thought required the introduction of slavery. Thus becoming commercialized, these colonists experienced a greed which, disregarding the consequences of the future, urged the importation of all classes of slaves to meet the demand for cheap labor.[4] This request was granted by the King of Spain, but the masters of such bondmen were expressly ordered to have them indoctrinated in the principles of Christianity. It was the failure of certain Spaniards to live up to these regulations that caused the liberal-minded Jesuit, Alphonso Sandoval, to register the first protest against slavery in America.[5] In later years the change in the attitude of the Spaniards toward this problem was noted. In Mexico the ayuntamientos were under the most rigid responsibility to see that free children born of slaves received the best education that could be given them. They had to place them "for that purpose at the public schools and other places of instruction wherein they" might "become useful to society."[6] [Footnote 1: Proslavery Argument; and Lecky, _History of England_, vol. ii., p. 17.] [Footnote 2: Faust, _German Element in United States_, vol. i., pp. 242-43.] [Footnote 3: Bancroft, _History of United States_, vol. i., p. 124.] [Footnote 4: Herrera, _Historia General_, dec. iv., libro ii.; dec. v., libro ii.; dec. vii., libro iv.] [Footnote 5: Bourne, _Spain in America_, p. 241.] [Footnote 6: _Special Report U.S. Com. of Ed._, 1871, p. 389.]