In the mean time Messalina and Silius, wholly unconscious of the danger, gave themselves up with greater and greater boldness and unconcern to their guilty pleasures. On the day when Callistus and his party went to Ostia she was celebrating a festival at her palace with great gayety and splendor. It was in the autumn of the year, and the festival was in honor of the season. In the countries on the Mediterranean the gathering of grapes and the pressing of the juice for wine, is the great subject of autumnal rejoicings; and Messalina had arranged a festival in accordance with the usual customs, in the gardens of the palace. A wine-press had been erected, and grapes were gathered and brought to it. The guests whom Messalina had invited were assembled around; some were dancing about the wine-press, some were walking in the alleys, and some were seated in the neighboring bowers. They were dressed in fancy costumes, and their heads were adorned with garlands of flowers. There was a group of dancing girls who were engaged as performers on the occasion, to dance for the amusement of the company, in honor of Bacchus, the god of wine. These girls were dressed, so far as they were clothed at all, in robes made of the skins of tigers, and their heads were crowned with flowers. Messalina herself, however, was the most conspicuous object among the gay throng. She was robed in a manner to display most fully the graces of her person; her long hair waving loosely in the wind. She had in her hand a symbol, or badge, called the _thyrsus_, which was an ornamented staff, or pole, surmounted with a carved representation of a bunch of grapes, and with other ornaments and emblems. The thyrsus was always used in the rites and festivities celebrated in honor of Bacchus. Silius himself, dressed like the rest in a fantastic and theatrical costume, danced by the side of Messalina, in the center of a ring of dancing girls which was formed around them. [Illustration: MESSALINA IN THE GARDEN.] In the mean time, while this gay party were thus enjoying themselves in the palace gardens at Rome, a very different scene was enacting at Ostia. Calpurnia, in her secret interview with Claudius, seizing upon a moment which seemed to her favorable for her purpose, kneeled down before him and made the communication with which she had been charged. She told him of Messalina's conduct, and informed him particularly how she had at last crowned the dishonor of her husband by openly marrying Silius, or at least pretending to do so. "Your friends believe," she added, "that she and Silius entertain still more criminal designs, and that your life will be sacrificed unless you immediately adopt vigorous and decided measures to avert the danger."