PORTA DEL POPOLO: -- Villa Borghese -- Villa di Papa Giulio -- Acqua Acetosa -- Ponte Molle -- Villa of Livia -- Veii -- Monte Mario -- Villas Mellini and Madama. PORTA SALARA: -- Villa Albani -- Catacomb of S. Priscilla -- Antemnæ -- Ponte Salara -- The Anio -- Fidenæ. PORTA PIA: -- Porta Nomentana -- Villa Torlonia -- Church and Catacomb of S. Agnese -- S. Costanza -- Ponte Nomentana -- Mons Sacer -- Tomb of Virginia -- Basilica and Catacomb of S. Alexander. PORTA S. LORENZO: -- The Roman Cemetery -- Basilica of S. Lorenzo -- Ponte Mammolo -- Hannibal's Camp -- Castel Arcione -- Aquæ Albulæ -- Ponte Lucano -- Tomb of the Plautii. TIVOLI: -- Villa D'Este -- Temples of Sibyl and Vesta -- The Glen and Falls -- Pons Vopisci -- Villa of Quintilius Varus -- The Cascades -- Ponte dell'Acquoria -- Villa of Mæcenas -- Temple of Hercules -- Hadrian's Villa. PORTA MAGGIORE: -- The Baker's Tomb -- The Aqueducts -- Tomb of Helena (?) -- Gabii -- Ponte di Nona -- Villa of the Gordian Emperors -- Tomb of Quintus Atta. PORTA S. GIOVANNI. _First Excursion_: -- Via Appia Nova -- Painted tombs -- S. Stephen's -- The Aqueducts -- Pompey's Tomb -- Albano -- Ariccia -- Genzano -- Lake and Village of Nemi -- Palazzolo -- Lake Albano -- Castel Gandolfo -- Site of Alba Longa (?) -- Vallis Ferentina -- Marino -- Grotta Ferrata -- Cicero's Villa. _Second Excursion_: -- Frascati -- Tusculum -- Rocca di Papa -- Monte Cavo. PORTA S. SEBASTIANO: -- Via Appia. (See page 258.) PORTA S. PAOLO: -- Pyramid of Caius Cestius -- S. Paul's outside the walls -- Remuria Hill -- Tre Fontane -- The Viaduct of Ancus Martius. OSTIA: -- Street of Tombs -- Houses -- Warehouses -- Temples -- Docks -- Palace -- Walls of Ancus Martius -- Museum -- View from Tower of the Castle -- Castel Fusano -- Pliny's Villa 302-349 VISITOR'S ROMAN DIRECTORY. ARTISTS IN ROME, ENGLISH AND AMERICAN -- ARTISTS, NATIVE AND FOREIGN -- CARRIAGE TARIFF -- GALLERIES, MUSEUMS, AND VILLAS OF ROME -- HOTELS RECOMMENDED -- PUBLIC LIBRARIES -- MASONIC -- ORDERS REQUIRED, AND WHERE OBTAINABLE -- OMNIBUS ROUTES IN ROME -- PROTESTANT CHURCHES IN ROME -- POSTAL NOTICES -- LIST OF EMPERORS -- LIST OF KINGS OF ROME 350-358 FIRST IMPRESSIONS. To get a good idea of Rome and its topographical situation, take a carriage and drive for three hours through the principal streets; more can be learned in this way than in any other.