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
With the view of producing a change in the state of African affairs, which excited uneasiness, the Romans resorted to the extraordinary measure of entrusting the conduct of the war to the only man who had as yet brought home honour from the Libyan plains, and who was recommended for this war by his very name. Instead of calling Scipio to the aedileship for which he was a candidate, they gave to him the consulship before the usual time, setting aside the laws to the contrary effect, and committed to him by special decree the conduct of the African war. He arrived (607) in Utica at a moment when much was at stake.
The Roman admiral Mancinus, charged by Piso with the nominal continuance of the siege of the capital, had occupied a steep cliff, far remote from the inhabited district and scarcely defended, on the almost inaccessible seaward side of the suburb of Magalia, and had united nearly his whole not very numerous force there, in the hope of being able to penetrate thence into the outer town. In fact the assailants had been for a moment within its gates and the camp- followers had flocked forward in a body in the hope of spoil, when they were again driven back to the cliff and, being without supplies and almost cut off, were in the greatest danger.
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Reference address : https://www.ellopos.net/elpenor/rome/4-01-gracchi.asp?pg=57