Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
The Last Days of Marius
The originator of all these outrages was Gaius Marius. He designated the victims and the executioners--only in exceptional cases, as in those of Merula and Catulus, was any form of law observed; not unfrequently a glance or the silence with which he received those who saluted him formed the sentence of death, which was always executed at once.
His revenge was not satisfied even with the death of his victim; he forbade the burial of the dead bodies: he gave orders--anticipated, it is true, in this respect by Sulla--that the heads of the senators slain should be fixed to the rostra in the Forum; he ordered particular corpses to be dragged through the Forum, and that of Gaius Caesar to be stabbed afresh at the tomb of Quintus Varius, whom Caesar presumably had once impeached;(6) he publicly embraced the man who delivered to him as he sat at table the head of Antonius, whom he had been with difficulty restrained from seeking out in his hiding-place, an slaying with his own hand.
6. Cf. IV. VII. Bestowal of Latin Rights on the Italian Celts
His legions of slaves, and in particular a division of Ardyaeans,(7) chiefly served as his executioners, and did not neglect, amidst these Saturnalia of their new freedom, to plunder the houses of their former masters and to dishonour and murder all whom they met with there.
7. Cf. IV. V. In Illyria
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Reference address : https://www.ellopos.net/elpenor/rome/4-09-cinna-sulla.asp?pg=17