Note 56 — Chapter IV
Reading edition
The merit of another, and apparently an original conjecture, belongs to Sismondi, who makes him the adulterous son of Bernardino, by one of Guidantonio's wives. For this there is no authority whatever; indeed, this historian, by confounding Guidantonio with his son, and omitting Oddantonio entirely, has utterly confused the family and history of Urbino. We have formerly set down Aura as daughter of Guidantonio, on authority of a licence from Nicholas V. for Federigo, his wife, and his sister Aura, to choose a confessor, quoted by Gallo Galli, and also in the MS. of Muzio (Vat. Urb. MSS., No. 1011), which is much fuller than the printed edition. Thus also Giovanni Sanzi, father of the painter Raffaele, in his rhyming chronicle of Federigo's life, which we shall frequently have to quote (Vat. Ottobon. MSS., No. 1305), and shall examine in our twenty-fifth chapter, says of him,—
"But others call this admirable flower Grandson of Guidantonio, being child Of that count's daughter, whose exalted name Is dear to virtue, Bernardino's wife Of th' Ubaldini."