The invitation was sent, and a vessel specially decorated was ordered to await her movements.  But, either from suspicion or from secret information, she declined to avail herself of it, and was conveyed to Baiae in a litter.  The effusion of hypocritical affection with which she was received, the unusual tenderness and honour with which she was treated, the earnest gaze, the warm embrace, the varied conversation, removed her suspicions, and she consented to return in the vessel of honour.  As though for the purpose of revealing the crime, the night was starry and the sea calm.  The ship had not sailed far, and Crepereius Gallus, one of her friends, was standing near the helm, while a lady named Acerronia was seated at her feet as she reclined, and both were vieing with each other in the warmth of their congratulations upon the recent interview, when a crash was heard, and the canopy above them which had been weighted with a quantity of lead, was suddenly let go.  Crepereius was crushed to death upon the spot; Agrippina and Acerronia were saved by the projecting sides of the couch on which they were resting; in the hurry and alarm, as accomplices were mingled with a greater number who were innocent of the plot, the machinery of the treacherous vessel failed.  Some of the rowers rushed to one side of the ship, hoping in that manner to sink it, but here too their councils were divided and confused.  Acerronia, in the selfish hope of securing assistance, exclaimed that she was Agrippina, and was immediately despatched with oars and poles; Agrippina, silent and unrecognized, received a wound upon the shoulder, but succeeded in keeping herself afloat till she was picked up by fishermen and carried in safety to her villa.

The hideous attempt from which she had been thus miraculously rescued did not escape her keen intuition, accustomed as it was to deeds of guilt; but, seeing that her only chance of safety rested in dissimulation and reticense, she sent her freedman Agerinus to tell her son that by the mercy of heaven she had escaped from a terrible accident, but to beg him not to be alarmed, and not to come to see her because she needed rest.

The news filled Nero with the wildest terror, and the expectation of an immediate revenge.  In horrible agitation and uncertainty he instantly required the presence of Burrus and Seneca.  Tacitus doubts whether they may not have been already aware of what he had attempted, and Dion, to whose gross calumnies, however, we need pay no attention, declares that Seneca had frequently urged Nero to the deed, either in the hope of overshadowing his own guilt, or of involving Nero in a crime which should hasten his most speedy destruction at the hands of gods and men.  In the absence of all evidence we may with perfect confidence acquit the memory of these eminent men from having gone so far as this.