Document composed of a loose bifolio, in horizontal format, with mixed writing (printed and handwritten); contains list of names, professions and addresses of the members of the Camara de Senadores (Chamber of Senators) of 1845. The document shows characteristics belonging to a complex unit (book or file). The support has darkening by oxidation, scattered spots in the form of yellow halos; folds, missing and/or loss of support and breaks in the edge of the document and in the central part of the document; it presents vertical and horizontal fold showing the format in four fields, the marks left by the folds are darker and with greater deterioration; evidence of adhesive imprinting on the opposite side of the folio, lateral horizontal fold.