In Golden Age some of the blind devoted themselves to the creation of poetic broadsides. Like many other traditional singers, blind poets penned acconunts of events, comical poems, didactic and moral verses and religious compositions, among other texts. We focused on one of these blind poets: Francisco de Alfantega y Cortés, who worked in the time of Felipe IV. So far, some pliegos sueltos of this traditional singer were known, but the fact that he was blind was unknown, as it is not stated in his prints. Thanks to a trial of faith to which he submitted under the Court of the Inquisition in Toledo in 1639, previously unknown to historiography, we could have access to this information. Francisco de Alfantega specialised in the creation of accounts of events extolling the ideals of the Spanish Habsburgs, thus participating in the information industry and in the process that formed an incipient public sphere during the early Modern Age.