To Study Separately each of those elements which the Portuguese, with instinctive genius, used for their expansion throughout the world, is a task to which every student of the Portuguese colonization-effort must devote his attention if he is to make any contribution, how small soever, to that history. Convinced that the negro was among the most telling and effective elements which were used for the colonization of Brazil, we propose here to study him in one of his most significant revolts against his masters. That revolt, on the part of some, stemmed from the desire of freeing themselves from slavery and domination; on the part of others, from the wish of civilizing, colonizing and taking part in the march of progress.