These were the most important of the eight articles approved by the synod, and they were grounded upon and defended by a multitude of arguments drawn from the Fathers and General Councils: they were not adopted without opposition, and every point was fought over in endless debates, for the conquerors and all holders of encomiendas contested stoutly for what they held to be their rights. The synod also established the conditions on which sacraments should be administered to the colonists, and addressed a full report of the proceedings to the Emperor, soliciting his confirmation and the royal authority for executing all that had been enacted.
Although Las Casas had several times essayed to bring the question of slavery before the council, no direct or explicit decision was given on that important point, and as his efforts were embarrassing, the Viceroy quickly told him that reasons of State had compelled him to defer a definite solution of that question. Far from quieting Las Casas, this information aroused his zeal all the more, and as a hearing in the council was denied him, he preached a few days later when the Viceroy was present, taking for his text this significant passage from the thirtieth chapter of the prophet Isaias: "For this is a rebellious people; lying children, children that will not hear the law of God. Who say to the seers, see not; and to the prophets, prophesy not right things unto us; speak unto us smooth things, prophesy deceits."
The sermon was not without the intended effect, and the Viceroy began to regret the exclusion of the subject of slavery from the council: as a compromise, he consented that separate meetings should be held in the convent of San Domingo to consider this subject, offering to transmit to the Emperor the conclusions adopted. Las Casas was ably seconded in the proceedings of these meetings, by Fray Luis Cancer, and a declaration was drawn up declaring that the Indians--with few exceptions--had been unjustly enslaved and that those who held them were bound to set them free: slave-holders were described as tyrants and all personal services exacted from the defenceless natives were condemned. Those who took part in these meetings and signed the decisions, were destitute of any means to give effect to them, but they adopted measures to publish and distribute copies of them throughout the colonies, in the hope that they might influence public opinion in the right direction.