[131] Frontinus, c. 76. [132] “At ex alia parte Anio in monte Trebanorum ortus lacus tres amœnitate nobiles, qui nomen dedere Sublaqueo defert in Tiberim.” (Plinii Nat. Hist., iii. 109.) [133] The inhabitants of Filettino probably belonged to the tribe of the Trebani, or of Trebula, who were located in the neighbourhood of Trevi, where was a Roman colony and principality. Inscriptions giving the names and titles of Augustus, Septimius Severus, and Commodus, were found here, and are published by Signor Gori in his Trattato dell’ Acqua Marcia, &c., 12mo., 1866, p. 37. Another inscription at Anagni, on the front of the Governor’s palace, gives the name of Publius Vecellius, curator of the Republic of the Trebani. Martial mentions the Treba Augusta of Frontinus, under the name of Trebula: “Trebula nos genuit, commendat gratia duplex Sive levi flamma, sive domamur aqua.” (Lib. v. epigr. 65, and lib. xiii. epigr. 33.) Livy also mentions it: “Eodem anno Arpinatibus Trebulanisque civitas data.” (Livii Hist., x. 1.) [134] IMP CAESARIS NERVAE TRAIA(_ni_) ... OP(T)IMI AVG GERMANIC DACICI. [135] “Lacus monasterii ad nihilum redactus, quia duo monachi levaverunt duo lapides, qui fuerunt firmati cum aliis petris; et sic aqua destruxit.” (Chronicon Sublacense, apud Muratori, Rer. Ital. Script., tom. xxiv. col. 962, D.) The author of this Chronicle was living in the year 1390. [136] Gruter, Inscriptiones, p. clv. 4. [137] Probably the text of Frontinus here is corrupt, because the Piscina Limaria and the _specus_ of Claudius are at the forty-sixth mile on the Via Sublacensis, “ad milliarium quadragesimum _secundum_,” for “Ad milliarium quadragesimum _sextum_.” [138] Dr. Fabio Gori, who is a native of Subiaco, claims the credit of being the first person to point out what this great work of Trajan really was. He also states that the Rivus Herculaneus, rising at thirty-eight miles on the Via Sublacensis, must have been a clear stream, which he finds on the left side of the river, opposite to the lake of S. Lucia and to this source of the aqueduct of the Claudia, called Acqua dell’ Arco, or water of the aqueduct. [139] Frontinus, c. 72. [140] The _piscina_ made in one of the towers in the wall at the point where it enters Rome, has the four chambers visible, the inner wall of the tower having been destroyed. [141] Inscriptions on the Porta Maggiore:— TI . CLAVDIVS DRVSI F. CAISAR AVGVSTVS GERMANICVS PONTIF MAXIM TRIBVNICIA POTESTATE X̅I̅I̅. COS. V. IMPERATOR X̅X̅V̅I̅I̅. PATER PATRIÆ AQVAS . CLAVDIAM EX FONTIBVS . QVI VOCABANTVR CAERVLEVS ET CVRTIVS . A MILLIARIO X̅X̅X̅X̅V̅. ITEM ANIENEM NOVAM A. MILLIARIO L̅X̅I̅I̅. SVA IMPENSA IN VRBEM PERDVCENDAS CVRAVIT.