[VALLE, Guglielmo della]. Lettere senesi...sopra le belle arti. Venice and Rome: Pasquali, Salomoni & Zempel, 1782-86. 3 volumes in 2, 4°. 2 engraved plates only, one folding. (Of 3, lacks a folding plate at the end of vol. I, light browning in vol. III.) Contemporary red half roan, gilt spines (a little rubbed). Cicognara 1217 -- Gaetano MILANESI. Documenti per la storia dell'arte senese. Siena: Onorato Porri, 1854-56. 8°. 3 volumes. (Some foxing.) Contemporary calf-backed boards (spines very faded). And another copy of the first work, in 3 volumes, containing the missing plate. (8)