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
Hannibal Driven Back - Death of Marcellus
After Hannibal had thus lost his most important acquisitions and found himself hemmed in by degrees to the south-western point of the peninsula, Marcus Marcellus, who had been chosen consul for the next year (546), hoped that, in connection with his capable colleague Titus Quintius Crispinus, he should be able to terminate the war by a decisive attack. The old soldier was not disturbed by the burden of his sixty years; sleeping and waking he was haunted by the one thought of defeating Hannibal and of liberating Italy.
But fate reserved that wreath of victory for a younger brow. While engaged in an unimportant reconnaissance in the district of Venusia, both consuls were suddenly attacked by a division of African cavalry. Marcellus maintained the unequal struggle--as he had fought forty years before against Hamilcar and fourteen years before at Clastidium--till he sank dying from his horse; Crispinus escaped, but died of his wounds received in the conflict (546).
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Reference address : https://www.ellopos.net/elpenor/rome/3-06-war-hannibal-cannae-zama.asp?pg=65