Campagna, 52.—Lago de’ Tartari, 52.—Lago di Solfatara, 53.—Ponte Lucano, 54.—Plautian monument, 54.—Sepulchres of the Sereni, 54.—Hadrian’s villa, 54.—Stage to Tivoli, 57.—Figures of Saints and Gods, 57.—Temple of Vesta, 57.—Opus incertum, 57.—Church of St. George, 59.—Waterfall, 59.—Villas, 60.—Villa of Horace, 61.—Villa of Q. Varus, 61.—Cyclopean Walls, 62.—Villa of V. Bassus, 64.—Vetriano, 64.—Quarries of travertine, 64.—Aqueducts, 65.—Cascatelli, 66.—Acqua Aurea, 66.—Temple of the World, 67.—Temple of Tosse, 67.—Villa of Mæcenas, 67.—Temple of Hercules, 67.—Portico of Hercules, 67.—Villa d’Este, 67. LETTER XXXVI. SUBIACO—PALESTRINA. Aqueducts, 68.—Road to Vico Varo, 70.—Villa of Syphax, 70.—Vico Varo, 70.—Rocca Giovane, 70.—Licenza, 71.—Fons Bandusiæ, 71.—Villa of Horace, 72.—Convent of San Cosimato, 72.—Valley of the Anio, 72.—Subiaco, 73.—Baths of Nero, 73.—Convent of Santa Scolastica, 74.—Convent of St. Benedict, 74.—Road to Palestrina, 75.—Genezzano, 75.—Palestrina, 76.—Temple of Fortune, 76.—Cyclopean Walls, 77.—Temple of the Sun, 77.—Villa of Constantine, 78.—Roman pavement, 78. LETTER XXXVII. TUSCULUM—ALBANO—OSTIA. Procession to obtain rain, 79.—St. Peter’s toe, 79.—Frascati, 79.—Grotto Ferrata, 80.—Tusculum, 80.—Mondragone, 81.—Sepulchre of L. V. Corvinus, 81.—Rocca del Papa, 81.—Monte Cavo, 82.—Via triumphalis, 82.—Villa of Domitian, 83.—Villa of Pompey, 83.—Lago di Albano, 83.—Emissario, 84.—Baths of Diana, 84.—Thermæ at Albano, 85.—Tomb of the Curiatii, 85.—Remains of the Appian way, 85.—Aricia, 85.—Lake of Nemi, 85.—Nemi, 86.—Velletri, 86.—Cross-roads, 87.—Cora, 87.—Temple of Hercules, 87.—Temple of Castor and Pollux, 88.—Vases found at Marino, 88.—Ostia, 90.—Mal aria, 90.—Port of Trajan, 91.—Sea-shore, 92.—Veii, 92.—Gabii, 93.—Sylva sacra, 94.—Nettuno, 94.—Antium, 94.—Ardea, 94. LETTER XXXVIII. JOURNEY TO FLORENCE. Companions in journey, 95.—Church at Monte Rosi, 96.—Nepi, 96.—Cività castellana, 96.—Poetical labourer, 97.—Otricoli, 97.—Narni, 97.—Terni, 97.—Cascade, 98.—Somma, 102.—Spoleto, 102.—Temple of Clitumnus, 103.—Foligno, 104.—Perugia, 104.—Thrasymene, 105.—Cortona, 106.—Grotto of Pythagoras, 106.—Arezzo, 106.—Church of the Pieve, 106.—Chapel in cathedral, 107.—Effects of slender supports, 108.—Murder, 108. LETTER XXXIX. MODENA—PARMA—MANTUA—FERRARA.