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
Last Debate in the Senate
Curio undertook once more to represent his master in the lion's den. In three days he made the journey from Ravenna to Rome. When the new consuls Lucius Lentulus and Gaius Marcellus the younger(25) assembled the senate for the first time on 1 Jan. 705, he delivered in a full meeting the letter addressed by the general to the senate.
25. To be distinguished from the consul having the same name of 704; the latter was a cousin, the consul of 705 a brother, of the Marcus Marcellus who was consul in 703.
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Reference address : https://www.ellopos.net/elpenor/rome/5-09-crassus-joint-rulers.asp?pg=51