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
As his sons were not
yet grown up, the reins of government were practically held by an
illegitimate nephew of the king, the prince Jugurtha. Jugurtha was
no unworthy grandson of Massinissa. He was a handsome man and a
skilled and courageous rider and hunter; his countrymen held him
in high honour as a clear and sagacious administrator, and he had
displayed his military ability as leader of the Numidian contingent
before Numantia under the eyes of Scipio.
His position in the
kingdom, and the influence which he possessed with the Roman
government by means of his numerous friends and war-comrades, made
it appear to king Micipsa advisable to adopt him (634), and to arrange
in his testament that his own two elder sons Adherbal and Hiempsal,
and his adopted son Jugurtha along with them, should jointly inherit
and govern the kingdom, just as he himself had done with his two
brothers. For greater security this arrangement was placed under
the guarantee of the Roman government.
