The third great branch from the Arch of Dolabella went direct to the Colosseum, and two subsidiary springs still flow there, one under the garden of the Villa Celi-Montana, the other under the garden of the monastery of SS. John and Paul, near to the Colosseum, the latter a very abundant stream, bubbling up copiously; and there are three small pools supplied by it in that quarry, which was formerly called the _Vivarium_, and supposed to have been the place where the wild beasts were kept, but this was a mistake[213]. From that reservoir another branch went in a _specus_ at a considerable depth under the garden of the Marchese Rappellini, behind the monastery of S. Gregory. In this garden there was a landslip in the spring of 1876, and the Marchese thought it probable that the palace of Scaurus had stood there, as it is close by the sloping road called the Clivus Scauri; I thought it more likely to have been the aqueduct which had fallen in, but agreed that the archæologists should excavate it, which was done in May. It turned out to be an old stone-quarry that had fallen in, at the depth of more than 20 ft., but the _specus_ of the aqueduct had passed through the quarry, and remained visible in the pit coming from the cave called the _Vivarium_, and going over the Porta Capena. There is, however, so little of interest left, that the pit was filled up again, after a plan and sketch had been made by Signor Cicconetti. Another branch of the three aqueducts (Marcia, Tepula, and Julia) went from the Porta di S. Lorenzo along the side of the road or _via_, so called, partly in the bank, by the side of it; the upper _specus_ is now visible, the other two are under it. The whole were underground until the levels were altered in the arrangements for the new city. This branch led straight to the _Mons Justitiæ_, in the centre of the great _agger_ of Servius Tullius. Near this point the four young princes found in their excavation, in 1870, two _cippi_ near together, with inscriptions upon them, stating that the _three aqueducts_ passed between them, and the _specus_ of the upper one, the Julia, was brought to light; the other two, Tepula and Marcia, remained underground. Not much more than a hundred yards from this, another _cippus_ had previously been found, on the top of a well, recording that it descended into the Anio Vetus, which therefore ran under the others, at a great depth in this part, on account of the different levels of the ground, and was then carried along the inner side of this great bank both right and left. The one to the right, or north, going to the gardens of Sallust, or at least a branch from one of the three, went along the horn-work at that corner of the old city, and had a reservoir under the house (now rebuilt by Mr. Spithœver), and then to the _nymphæum_ at the end, and (to the east) of the _Porticus Milliarius_ of Aurelian. In the opposite direction, the left, or south,