—— Original termination in front of the Septa, near the Pantheon ib. VII. ALSIETINA. Passages from Frontinus 50 Lacus Alsietina, Lago di Martignano ib. Aqua Paola 51 Lacus Sabatina ib. Junction of two _specus_ at the Cariæ (Osteria Nuova) 52 Casale Bianca, additional springs ib. In Tunnels to Rome 53 VIII. CLAUDIA. IX. ANIO NOVUS. Passages from Frontinus 54 River Anio 56 Cascades at Valle-Pietra 57 Bridge of Communacchio ib. Sacro Speco ib. Monasteries of S. Benedict and S. Scholastica ib. Subiaco ib. Lacus—Lakes or Lochs of Nero 58 Villa Sublacensis ib. Great dam at Piè-di-lago ib. Bridge of S. Mauro ib. _Specus_ of the Anio Novus, cut in the rock of the cliff ib. Ruins of _piscinæ_ 59 Lowest loch circular 60 _Piscina Limaria_, forty-two miles on the Via Sublacensis ib. _Specus_ of Claudia 61 Bridges at Vicovaro and in the Valley of the Arches, two miles above Tivoli ib. Cascade at Tivoli ib. Promenade of Carciano ib. Bridge of S. Antonio and Ponte Lupo 62 —— near the road to Poli ib. The _Piscinæ_ 63 _Specus_ of the Claudia of stone, of the Anio Novus of brick over it, on a stone arcade ib. _Piscina_ at the Porta Furba 64 Other reservoirs ib. The Neronian Arches ib. Porta Maggiore, inscriptions on 65 Architect of the Claudia 66