Lucca, 409.—Cathedral, 409.—St. Michael, 410.—S. Frediano, 411.—Santa Maria foris portam, 411.—S. Giusto, 412.—S. Cristoforo, 412.—Progressive dates, 412.—Cathedral at Pistoja, 412.—Sant Andrea, 413.—Baptistery, 413.—Cathedral at Prato, 413.—Ramparts of Lucca, 413.—Baths of Lucca, 413.—Forest of chesnut trees, 414.—Prato Fiorito, 414.—Road across the mountains to Modena, 415.—Lignite at Ghivizzano, 415.—Viareggio, 415.—Roman baths at Massaciuccoli, 415.—La Bettona, 416.—Monte Cimone, 416.—Woods on the Apennines, 416.—School among the Apennines, 416.—Flames at Birigazza, 416.—Journey to Carrara, 416.—Marble quarries, 417.—Cathedral, 417.—School of sculpture, 417.—Lerici, 418.—Porto Venere, 418.—Gulf of Spezia, 418.—Journey to Genoa, 418.—Genoa, 420.—Cathedral at Genoa, 420.—S. Cyr, 420.—Church of S. M. Annunziata, 420.—Santa Maria di Carignano, 420.—Statue of St. Sebastian by Puget, 420.—Church of St. Ambrose, 421.—Church of St. Stephen, 421.—Tomb of Doria, 421.—Palaces, 421.—Poor-house at Genoa, 421.—Journey to Turin, 422.—Turin, 422.—Cathedral, 423.—Chapel of the Santo Sudario, 423.—San Filippo, 423.—San Lorenzo, 424.—Smaller churches at Turin, 424.—Arsenal, 424.—Theatre, 424.—Palaces, 424.—Botanic garden, 425.—Superga, 425.—Arch of Augustus at Susa, 426.—Walk over Mount Cenis, 427.—Cathedral at Chamberi, 428.—Antiquities at Aix, 429.—Journey to Geneva, 429. LETTERS OF AN ARCHITECT. LETTER XXXI. ROME. _Rome, May, 1817._