XXXIX. When Marcius returned to Antium, Tullus, who had long hated him and envied his superiority, determined to put him to death, thinking that if he let slip the present opportunity he should not obtain another. Having suborned many to bear witness against him, he called upon him publicly to render an account to the Volscians of what he had done as their general. Marcius, fearing to be reduced to a private station while his enemy Tullus, who had great influence with his countrymen, was general, answered that he had been given his office of commander-in-chief by the Volscian nation, and to them alone would he surrender it, but that as to an account of what he had done, he was ready at that moment, if they chose, to render it to the people of Antium. Accordingly the people assembled, and the popular orators endeavoured by their speeches to excite the lower classes against Marcius. When, however, he rose to speak, the mob were awed to silence, while the nobility, and those who had gained by the peace, made no secret of their good will towards him, and of their intention to vote in his favour. Under these circumstances, Tullus was unwilling to let him speak, for he was a brilliant orator, and his former services far outweighed his last offence. Indeed, the whole indictment was a proof of how much they owed him, for they never could have thought themselves wronged by not taking Rome, if Marcius had not brought them so near to taking it. Tullus, therefore, thought that it would not do to wait, or to trust to the mob, but he and the boldest of his accomplices, crying out that the Volscians could not listen to the traitor, nor endure him to play the despot over them by not laying down his command, rushed upon him in a body and killed him, without any of the bystanders interfering in his behalf. However, the most part of the nation was displeased at this act, as was soon proved by the numbers who came from every city to see his dead body, by the splendid funeral with which he was honoured, and by the arms and trophies which were hung over his tomb, as that of a brave man and a consummate general.
The Romans, when they heard of his death, made no sign of either honour or anger towards him, except that they gave permission to the women, at their request, to wear mourning for him for ten months, as if they were each mourning for her father, her brother, or her son. This was the extreme limit of the period of mourning, which was fixed by Numa Pompilius, as has been related in his Life.
The loss of Marcius was at once felt by the Volscians. First of all, they quarrelled with the Aequi, their friends and allies, and even came to blows with them; next, they were defeated by the Romans in a battle in which Tullus was slain, and the flower of the Volscian army perished. After this disaster they were glad to surrender at discretion, and become the subjects of Rome.