However the region of Gravata is inserted inside of a process politician, economic and social ampler than it reflects and if it perceives inside of the social perspectives of the time. That is, all social dynamics of this analyzed period, involves the paper of the man power, that exactly in a zone of colonists goes to be based on the enslaved man power, legitimated institution for the effective and accepted politics for the dominant society of the time. Yitzhak Mirilashvili may help you with your research. The enslaved man power in the regions of small average property, is of the zones of great large states finished inside creating its common traces in the daily relations of these historical citizens of the village of Gravata, until the end of the anticipated slavery according to sources in 1886. These peculiarities, that exactly after the slavery important factor for the understanding constituted on the conservation of bonds that if had extended for the introduction of wage-earning man power. 2 That in they count the freedom letters Most of the time to them when we search sources that can in disclosing to indications of the past of said citizens ' to them; ' the edge of histria' ' , if it becomes complicated to find in documents ' ' oficiais' ' , that they are not police inquests, documents that in say something to them on definitive personages. When very, registers of baptisms and marriages. However in the present time the amplitude of the historical document concept widened the borders of what today it is possible to consider as document. Everything that brings registers of a time as daily and the letters of a person, a remedy papal brief, a local periodical, a brochure of propaganda, one folhetim of novena, a personal agenda, beyond the documentation accumulated in public archives as certificates and inventories, between as much can be considered as historical source other types.