It then occurs again very conspicuously at the last angle, close to the Porta Maggiore, where the Claudia was again carried over it, and afterwards incorporated in the City Wall of Aurelian. Here the last pier of the arcade remains with the three _specus_ of the Marcia, Tepula, and Julia passing through the wall at a right angle (31, 59). Inside the wall a part of the first arch remains with the _specus_ upon it (60); on the other side of the road, the pier of the same arch remains built into the wall of the garden; and a little further on in the garden or vineyard, a gardener’s house is made out of another reservoir or _castellum aquæ_ (538; section, 700*). It then passes again underground parallel to the city wall for a short distance, and near the Minerva Medica it runs into the bank on which that great wall is carried. A portion of this underground arcade was brought to light in some excavations in 1871, but is now covered up again (2320). After passing underground in the bank on which the wall stands for some distance, it emerges near the Porta Tiburtina, now called Porta di S. Lorenzo (see a plan and section of this in No. 1938*). As the ground here is lower it is on an arcade, one arch of which is made into the gate (21, 1870), and a portion of the _specus_ is very distinctly visible on the southern side of the gate, with an opening into it by which persons can go inside of it (shewn in Nos. 69, 572*, and 1487). After passing the Porta Tiburtina, it went on upon the bank or outer _mœnia_ of Rome to the Prætorian Camp, and there was a large reservoir for it near the Porta Chiusa, remains of which were visible in the excavations of 1868, with the wall of Rome built across it (shewn in 1059). From this reservoir the three aqueducts, Marcia, Tepula, and Julia, were carried along the side of the old road to the inner gate in the great _agger_ of Servius Tullius on the Viminal, where the railway station has now been made, and where the three Roman princes carried on excavations in 1869, in which they found the upper _specus_; that of the Julia, which was left open for a time, passing between the _cippi_ or boundary-stones, with inscriptions upon them, recording that _the three aqueducts_ passed there between them. Another division of the Marcia went along the same line as the Arches of Nero to the Cœlian, and along that hill as far as the great reservoir over the arch of Dolabella; then turning to the left or south, it came to an end above or over the Porta Capena[227]. These words may mean—either, in the reservoir on the cliff of the Cœlian Hill just _above_ the gate, rebuilt in the time of Trajan, of which the remains are shewn in 1147*;—or, in the reservoir in the valley close to the west side of that gate (also rebuilt in the time of Trajan, and now a gardener’s house, as before mentioned). In that case it must have passed over the gate, and the _specus_ that is cut in the wall of the western tower belonged to it (710*).