XLI. The King of the Arabians in the neighbourhood of Petra[293] hitherto had not troubled himself at all about the Romans, but now being much alarmed he wrote to say that he was ready to submit and to do anything. Pompeius wishing to confirm him in this disposition made an expedition against Petra, wherein he did not altogether escape censure from most people. For they considered that this was evading the pursuit of Mithridates, and they urged him to turn against him who was his old antagonist and was fanning his flame and preparing according to report to lead an army through the country of the Scythians and Pæonians[294] against Italy. But Pompeius thinking it would be easier to crush the forces of Mithridates in the field than to overtake him when he was flying, did not choose to exhaust himself to no purpose in a pursuit, and he contrived to find other occupations in the interval of the war and he protracted the time. Fortune, however, settled the difficulty; for when he was at no great distance from Petra, and had already pitched his camp for that day and was exercising himself with his horse around the camp, letter-bearers rode up from Pontus with good tidings. This was manifest at once by the points of their spears, for they were wreathed with bay. Pompeius at first wished to finish his exercises, but as the men called out and entreated him, he leapt from his horse and taking the letters advanced into the camp. But as there was no tribunal[295] and there had not been time to make even the kind of tribunal that is used in the camp, which they are accustomed to form by digging out large lumps of earth and putting them together upon one another, in their then zeal and eagerness they piled together the loadings of the beasts of burden and raised an elevated place. Pompeius ascending this announced to the soldiers, that Mithridates was dead, having put an end to his own life because his son Pharnakes[296] rebelled against him, and Pharnakes had taken possession of everything in those parts, and put all under his own dominion and that of the Romans, as he said in his letter.