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 Roman Government and the Barcides
On the part of Rome too nothing took place calculated seriously to alter the course of Spanish affairs. The first and chief cause of the inactivity of the Romans was undoubtedly their very want of acquaintance with the circumstances of the remote peninsula--which was certainly also Hamilcar's main reason for selecting Spain and not, as might otherwise have been possible, Africa itself for the execution of his plan.
The explanations with which the Carthaginian generals met the Roman commissioners sent to Spain to procure information on the spot, and their assurances that all this was done only to provide the means of promptly paying the war-contributions to Rome, could not possibly find belief in the senate. But they probably discerned only the immediate object of Hamilcar's plans, viz. to procure compensation in Spain for the tribute and the traffic of the islands which Carthage had lost; and they deemed an aggressive war on the part of the Carthaginians, and in particular an invasion of Italy from Spain--as is evident both from express statements to that effect and from the whole state of the case--as absolutely impossible.
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Reference address : https://www.ellopos.net/elpenor/rome/3-04-hamilcar-hannibal.asp?pg=17