The Lives of the Twelve Caesars by Suetonius — Tiberius, Death and rejoicing

Meanwhile, finding, upon looking over the acts of the senate, "that some person under prosecution had been discharged, without being brought to a hearing," for he had only written cursorily that they had been denounced by an informer; he complained in a great rage that he was treated with contempt, and resolved at all hazards to return to Capri; not daring to attempt any thing until he found himself in a place of security. But being detained by storms, and the increasing violence of his disorder, he died shortly afterwards, at a villa formerly belonging to Lucullus, in the seventy-eighth year of his age, and the twenty-third of his reign, upon the seventeenth of the calends of April [i6th March], in the consulship of Cneius Acerronius Proculus and Caius Pontius Niger. ^73.2Some think that a slow-consuming poison was given him by Caius. Others say that during the interval of the intermittent fever with which he happened to be seized, upon asking for food, it was denied him. Others report, that he was stifled by a pillow thrown upon him, when, on his recovering from a swoon, he called for his ring, which had been taken from him in the fit. Seneca writes, "That finding himself dying, he took his signet ring off his finger, and held it a while, as if he would deliver it to somebody; but put it again upon his finger, and lay for some time, with his left hand clenched, and without stirring; when suddenly summoning his attendants, and no one answering the call, he rose; but his strength failing him, he fell down at a short distance from his bed."

⁷⁴Upon his last birth-day, he had brought a full-sized statue of the Timenian Apollo from Syracuse, a work of exquisite art, intending to place it in the library of the new temple; but he dreamt that the god appeared to him in the night, and assured him "that his statue could not be erected by him." A few days before he died, the Pharos at Capri was thrown down by an earthquake. And at Misenum, some embers and live coals, which were brought in to warm his apartment, went out, and after being quite cold, burst out into a flame again towards evening, and continued burning very brightly for several hours.

^75.1The people were so much elated at his death, that when they first heard the news, they ran up and down the city, some, crying out "Away with Tiberius to the Tiber;" others exclaiming, "May the earth, the common mother of mankind, and the infernal gods, allow him no abode in death, but amongst the wicked." Others threatened his body with the hook and the Gemonian stairs, their indignation at his former cruelty being increased by a recent atrocity. ^75.2It had been provided by an act of the senate, that the execution of condemned criminals should always be deferred until the tenth day after the sentence. Now this fell on the very day when the news of Tiberius's death arrived, and in consequence of which the unhappy men implored a reprieve, for mercy's sake; but. as Caius had not yet arrived, and there was no one else to whom application could be made on their behalf, their guards, apprehensive of violating the law, strangled them, and threw them down the Gemonian stairs. ^75.3This roused the people to a still greater abhorrence of the tyrant's memory, since his cruelty continued in use even after he was dead. As soon as his corpse was begun to be moved from Misenum, many cried out for its being carried to Atella, and being half burnt there in the amphitheatre. It was, however, brought to Rome, and burnt with the usual ceremony.

⁷⁶He had made, about two years before, duplicates of his will, one written by his own hand, and the other by that of one of his freedmen; and both were witnessed by some persons of very mean rank. He appointed his two grandsons, Caius by Germanicus, and Tiberius by Drusus, joint heirs to his estate; and upon the death of one of them, the other was to inherit the whole. He gave likewise many legacies; amongst which were bequests to the Vestal Virgins, to all the soldiers, and each one of the people of Rome, and to the magistrates of the several quarters of the city.