Translation of a 1571 collection of bulls and indulgences granted to crusaders and familiars of the inquisition by popes from the thirteenth to the sixteenth centuries, confirmed by Pius V (1570). Text gives incipits and dates of the original documents, with minimal summary. Last folio contains Spanish summary of Pius V's 1569, "Institución de la Cofradía de San Pedro Martyr, de Oficiales, y Ministros del Santo Oficio de la Inquisicion."