OUR present walk must include a larger circuit than the former. We pass through the Piazza Barberini, and along the Via di San Basilio, which will presently lead us beyond the inhabited district of the city, and an Englishman begins to feel himself in the country, though within the walls. Here is the Villa Ludovisi, but it is difficult to gain admission; we therefore turn to the right, and at the Viccolo delle Fiamme, enter into the gardens, which, like those passed through by Aladdin, in the Arabian Nights, are not divided by fences from one another, but merely secured on the part towards the road. The first thing which offers itself to our observation is a fragment of a wall of large stones, said to be a remnant of that built by Tarquinius Superbus, which was itself a restoration in more solid masonry, of the one first erected by Servius Tullius, to include the Quirinal within the circuit of Rome. A little farther we trace distinctly the form of the circus of Sallust, which occupies a continuation of the hollow between the Pincian and Quirinal hills; and close by it, but not uniformly in a parallel direction, is a series of arches and substructions supporting the hill; but the fragment of Tarquinius Superbus seems to have nothing to do, either with the circus or with these substructions. It is a trifle in itself, but its antiquity gives it interest, and more is said to have been disclosed by digging. At some distance, along the foot of the substructions abovementioned, and close upon the circus, we reach the Temple of Venus Erycina (let the antiquaries quarrel about the name, I use that by which it is commonly distinguished). The principal part consists of a circular, domed chamber, almost buried in the earth and rubbish which has descended from the hill above, with a small semicircular niche, and two square recesses on each side, two of which are open, and give admission to the building. The principal entrance is from a little vestibule, by means of a large arch; and a corresponding arch, with a similar vestibule, opens to the deep cell or adytum of the temple; both these arches interrupt the line of the springing of the dome. This and the other fragments abound in reticulated work. Issuing from the vineyards, and crossing the long street of the Porta Pia, we may follow the Via del Macao, to look at a house built under the direction of Milizia; but though an able writer on architecture, he was not a good architect.