Amalasuntha was forced to bow to this, the public opinion of her own people. The result was disastrous; for the young Athalaric, like a true barbarian, was soon led away into a bestial sensuality which presently destroyed his health and sent him to an early grave. Seeing his instability both of body and mind, Amalasuntha entered into secret communication with Constantinople, where Justinian was now emperor, and even prepared for a possible flight to that city. Thus in 534, when she received an ambassador in Ravenna from Justinian who demanded of her the surrender of Lilybaeum, a barren rock in Sicily which Theodoric had assigned to Thrasamund on his marriage with his sister Amalafrida, in public she protested vigorously against the attempt of the emperor to pick a quarrel with "an orphaned king" too young to defend himself; but in private she assured the imperial ambassador of her readiness "to transfer to the emperor the whole of Italy." Italy was in this unstable state when, on the 2nd October 534, Athalaric died in his eighteenth year. This apparently upset Amalasuntha's plans. At any rate, we see her suddenly face quite about and sending for Theodahad, the son of Amalafrida, upon whom she had but lately pronounced a humiliating sentence, she offered to make him her official colleague upon the Gothic throne. This man was an ambitious villain. Of course he accepted Amalasuntha's foolish offer and swore to observe the agreement made between them. But before many weeks had passed he had made her a prisoner and had her securely hidden upon an island in the Lake of Bolsena in Umbria. But Theodahad appears to have been a fool as well as a villain. Having disposed of Amalasuntha, he sent an embassy to Constantinople to explain his conduct and to attempt to come to terms with Caesar. For his ambassadors he chose not Gothic nobles, who might have found his actions to their advantage, but Roman senators all but one of whom told a plain tale. Justinian immediately despatched his ambassador Peter to reassure Amalasuntha of his protection and to threaten Theodahad that if she were hurt it would be at the price of his own head. Peter however, had scarcely landed in Italy when he had news of Amalasuntha's murder in her island prison. He continued at once on his way to Ravenna, and there in the court before all the Gothic nobles not only denounced the murderer, but declared "truceless war" upon the Goths.[1] [Footnote 1: Cf. Procopius, _De Bello Gotico_, 25. The murder of Amalasuntha served the interests of the imperialists so well that public opinion at Constantinople attributed it to Peter the ambassador and to Theodora, the wife of Justinian. It remains, however, extremely doubtful whether there is any truth in this accusation, although it is certain that Theodora was in communication with Theodahad.]