4 de junio 1469: Contrato entre “Magister Franciscus… florentinus” y los “priori” de Perugia. ward1953, p. 60: ‘Franciscus agreed to sing ancient and modern ystorias on the “feast days ordained by the church for the solace of the Noble Citizens of Perugia and others inclined to listen,” accompanying himself on a viola seu guitarra; further on in the document he is described as a Quitarrista seu violinista. Reprinted in Adamo Rossi, “Memorie de Musica Civile in Perugia nel seculi XIV & XV” Giornale di Erudizione Artistica 3 (1874), 139.