MANTUA. Vincenzo I GONZAGA (1562-1612) duke of Mantua. L.S., Mantua January 5, 1608, to Giacomo Filippo Petrochino in Macerata; ¾page in-fol., address, seal with arms under paper (qqs foxing); in Italian. He asks him to represent him in holding the son of Doctor Ercole Borsatti, who will bear his name, at the baptismal font...