The same water used for the Aqua Felice, but the petrifying stream excluded 88 A fine arcade for miles, from the source to Cento-Celle ib. Part of it of the first century, other part of the third. Alexandrina (?) ib. Aqueduct of Hadrian mentioned by Spartianus, but not in the Regionary Catalogue 89 Branch from the great aqueducts to the Mausoleum of S. Helena (Torre Pignattara) and to the Villa of the Gordiani (Torre de’ Scavi) 90 —— not connected with this aqueduct ib. —— but also has _piscinæ_ of the first and third centuries ib. Branch of Trajan to the Aventine from the Cœlian ib. XII. AURELIA, A.D. 185. XIII. SEVERIANA, A.D. 190. The Aurelia made by Marcus Aurelius 92 —— to convey water to the Villa de Quintilii ib. —— continued by Commodus and Septimius Severus to their _thermæ_ in Regio I. ib. Remains of _piscinæ_ outside of the Porta Latina ib. Remains of the _thermæ_ inside of that gate ib. Sources on the hill of Marino 93 _Specus_ partly underground, part on arcade at the Torre di Mezza, Via di Albano ib. Large reservoir at the Villa de Quintilii ib. Others on the Via Appia, between that Villa and Rome ib. —— at the Circus of Romulus ib. —— at S. Urbano ib. —— at the Nymphæum in the valley of the Caffarella (miscalled the Fountain of Egeria) ib. _Specus_ visible in the cliff of that valley, near the Dio Ridicolo 94 Remains of the _thermæ_ in the Monte d’Oro ib. XIV. ANTONINIANA, A.D. 215. This aqueduct enters Rome at the south-east corner 95 —— passes over the arch of Drusus ib. —— along the inner side of the great bank on which the Wall of Aurelian is built ib. —— to the _piscina_ of the Thermæ of the Antonines or of Caracalla ib. Fine _piscina_ and _castellum_ on the edge of the hill overlooking the valley of the Caffarella ib. Remains of others on the Via Latina 96