“the assumption of the Virgin, as painted by sublime artists, Petrarch's Hymn to the Madonna, cannot have spoken to the world wholly without result”
Inferred Named explicitly as 'Petrarch's Hymn to the Madonna'; this is Canzone 366, 'Vergine bella'. Fuller explicitly names 'Petrarch's Hymn to the Madonna' — the final canzone of the Canzoniere, 'Vergine bella, che di sol vestita,' which appears in full in Appendix B.