In antiquity this sylvan landscape was the scene of a strange and recurring tragedy. In order to understand it aright we must try to form in our minds an accurate picture of the place where it happened; for, as we shall see later on, a subtle link subsisted between the natural beauty of the spot and the dark crimes which under the mask of religion were often perpetrated there, crimes which after the lapse of {p2} so many ages still lend a touch of melancholy to these quiet woods and waters, like a chill breath of autumn on one of those bright September days “while not a leaf seems faded.” [Sidenote: The Alban hills.] The Alban hills are a fine bold group of volcanic mountains which rise abruptly from the Campagna in full view of Rome, forming the last spur sent out by the Apennines towards the sea. Two of the extinct craters are now filled by two beautiful waters, the Alban lake and its lesser sister the lake of Nemi. Both lie far below the monastery-crowned top of Monte Cavo, the summit of the range, but yet so high above the plain that standing on the rim of the larger crater at Castel Gandolfo, where the Popes had their summer palace, you look down on the one hand into the Alban lake, and on the other away across the Campagna to where, on the western horizon, the sea flashes like a broad sheet of burnished gold in the sun. [Sidenote: The sanctuary of Diana Nemorensis.] The lake of Nemi is still as of old embowered in woods, where in spring the wild flowers blow as fresh as no doubt they did two thousand springs ago. It lies so deep down in the old crater that the calm surface of its clear water is seldom ruffled by the wind. On all sides but one the banks, thickly mantled with luxuriant vegetation, descend steeply to the water’s edge. Only on the north a stretch of flat ground intervenes between the lake and the foot of the hills. This was the scene of the tragedy. Here, in the very heart of the wooded hills, under the abrupt declivity now crested by the village of Nemi, the sylvan goddess Diana had an old and famous sanctuary, the resort of pilgrims from all parts of Latium. It was known as the sacred grove of Diana Nemorensis, that is, Diana of the Wood, or, perhaps more exactly, Diana of the Woodland Glade.​[1] Sometimes the lake and grove were called, after the nearest town, the lake {p3} and grove of Aricia.​[2] But the town, the modern Ariccia, lay three miles away at the foot of the mountains, and separated from the lake by a long and steep descent. A spacious terrace or platform contained the sanctuary. On the north and east it was bounded by great retaining walls which cut into the hillsides and served to support them. Semicircular niches sunk in the walls and faced with columns formed a series of chapels, which in modern times have yielded a rich harvest of votive offerings. On the side of the lake the terrace rested on a mighty wall, over seven hundred feet long by thirty feet high, built in triangular buttresses,