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
Under what circumstances during this epoch theft was regarded as at all expiable, and what in such an event the person injured was entitled to demand from the thief, cannot be ascertained.
But the injured party with reason demanded heavier compensation from a thief caught in the very act than from one detected afterwards, since the feeling of exasperation which had to be appeased was more vehement in the case of the former than in that of the latter.
If the theft appeared incapable of expiation, or if the thief was not in a position to pay the value demanded by the injured party and approved by the judge, he was by the judge assigned as a bondsman to the person from whom he had stolen.
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Reference address : http://www.ellopos.net/elpenor/rome/1-11-law-justice.asp?pg=8