Bartolomé de las Casas, The Letters of Amerigo Vespucci…
“ As they saw the natives so gentle, meek, and tractable, although neither could understand a single word of what the other said, and therefore the Spaniards could not teach the Indians any doctrine, yet, says Americo, they baptized an infinite number; whence it appears how little Americo, and those who were with him, appreciated the practice of the sacraments and the reverence that is due to them, nor even the disposition and frame of mind with which they should be received. It is manifest that those Christians, in baptizing the natives, committed a great offence against God. ”
