Further on towards the Porta di S. Lorenzo the ground is higher, and in order to keep the level necessary for the _specus_, it is brought within the wall, and built up against the inside of it (1871). The Marcia, Tepula, and Julia, over which it is carried, as is seen at the two gates where their arcade is visible _under_ the _specus_ of the Aqua Felice, are here still under it, but _underground_ also, owing to the higher level of the ground. It passes over the Porta di S. Lorenzo to a reservoir on the north side of it, and then turns to the west by the side of the road, which it crosses upon an arch, with an inscription upon it, at a short distance within that gate (81). The principal termination of it is at the Fountain of the Termini (called of Moses,) 71. Behind the fountain is a reservoir after the old fashion, which is illustrated by a plan and section (704*). The celebrated Fountain of the Triton (1196), in the Piazza Barberini, is also supplied by this aqueduct, as well as all the upper terraces upon the hills. The lower range, on the Campus Martius, is chiefly supplied by the Virgo. Another branch goes from the reservoir at the Porta Maggiore along the bank on which the Arches of Nero are carried, to the Lateran, where the fountains are supplied by this water. The old aqueduct was used according to the custom of the time, and there is a cascade _specus_ from the level of the Marcia to that of the Appia (shewn in 541). The _specus_ of each of these old aqueducts was used to carry the metal pipes of the Aqua Felice, when it was convenient to do so (1295*), as has been previously mentioned. THE AQUA MARCIA PIA was made by a Company between 1860 and 1870, and has been mentioned under the head of the Marcia (a part of it is shewn in 1553). THE AQUEDUCTS. ANIO NOVUS.—THE RIVER ANIO. DESCRIPTION OF THE PHOTO-ENGRAVINGS. PLATE I. [Illustration: AQUEDUCTS—SOURCE OF AQUA APPIA. ANCIENT QUARRY OF THE KINGS.]