Titus Livius (Livy), The History of Rome, Book 28
Frank Gardener Moore, Professor Emeritus in Columbia University, Ed.

31. Laelius as victor sailed back to Carteia, and on hearing of the occurrences at Gades —that the betrayal had been revealed and the conspirators sent to Carthage; [2] that the hope in which they had come to him had been frustrated —he sent messengers to Lucius Marcius, saying that unless they wished to waste time to no purpose in idling before Gades, they must return to the commander-in-chief. As Marcius agreed, they both returned after a few days to (New) Carthage. [3] Upon their departure Mago was not only [p. 129]relieved, since he was beset by a two-fold source of¹ alarm, by sea and by land, but when he heard of the defection of the Ilergetes he conceived the hope also of recovering Spain. [4] Accordingly he sent messengers to the senate at Carthage, to exaggerate at the same time both the mutiny of citizens in the Roman camp and the rebellion of allies, and to urge them to send auxiliaries, by whose help rule over Spain, which they had inherited from their fathers, could be recovered.

[5] Mandonius and Indibilis returned into their own territory and for a time remained quietly on the alert, until they should know what decision was reached in regard to the mutiny, not without confidence that, if a misunderstanding on the part of Roman citizens should be pardoned, they themselves also might possibly be pardoned. [6] After the harsh punishment came to be generally known, they thought that their guilt likewise was reckoned as deserving the same penalty. [7] Recalling the men of their tribe to arms and assembling their previous auxiliaries, with twenty thousand infantry and two thousand five hundred cavalry they crossed into the land of the Sedetani,² where they had maintained a permanent camp at the beginning of the rebellion.