Slavery was absent from Moses Austin's petition to settle an American colony in North Mexico
"The question of slavery presented the greatest obstacle to the passage of the law. Austin believed that at least temporary toleration of slavery was necessary to the success of his colony. It was the slaveholding population of Missouri, Louisiana, Tennessee, Kentucky, Arkansas, and Mississippi that had shown the greatest interest in his settlement, and it was from the slave states of the American Union that he expected future support in his enterprise. On the other hand, the Mexican people were at that time passing through a period of fervent advocacy of liberty. Had they not just been freed from Spain? Should they not extend this great boon, liberty, to all people within the authority of their laws? Then, too, and this was more important than all their theories of liberty and natural equality, it was merely an abstract question with them, for they had few slaves to lose by a general emancipation."