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
Process against Rabirius
The mode in which the democracy dealt with the ancient criminal jurisdiction of the comitia was characteristic. It had not been properly abolished by Sulla, but practically the jury-commissions on high treason and murder had superseded it,(5) and no rational man could think of seriously re-establishing the old procedure which long before Sulla had been thoroughly unpractical.
5. Cf. IV. X. Permanent and Special -Quaestiones-
But as the idea of the sovereignty of the people appeared to require a recognition at least in principle of the penal jurisdiction of the burgesses, the tribune of the people Titus Labienus in 691 brought the old man, who thirty-eight years before had slain or was alleged to have slain the tribune of the people Lucius Saturninus,(6) before the same high court of criminal jurisdiction, by virtue of which, if the annals reported truly, king Tullus had procured the acquittal of the Horatius who had killed his sister.
6. Cf. IV. VI. And Overpowered
Do you see any typos or other mistakes? Please let us know and correct them
Reference address : https://www.ellopos.net/elpenor/rome/5-05-parties-pompeius.asp?pg=8