On his arrival at Arequipa, Gonzalo found that city entirely deserted, as most of the inhabitants had gone to join Diego Centeno after that officer got possession of Cuzco. Hearing that Centeno was in the Collao, near the lake of Titicaca, where after his junction with Mendoza, he had an army of near a thousand men, composed of the troops of Cuzco Las Charcas and Arequipa, and with which they occupied all the passes towards the interior, Gonzalo believed it almost impossible to attack these officers with any probability of success. He waited therefore at Arequipa about three weeks, expecting the junction of D'Acosta, who at length arrived, but with very diminished numbers, as already related, many having abandoned him, and having put many of his followers to death on suspicion that they intended to desert. After the junction of D'Acosta, Gonzalo found himself at the head of five hundred men. He now wrote to Centeno, giving a recital of all the events which had occurred during the troubles, and dwelt particularly on the favour he had always shewn him, and particularly instanced the pardon he had granted him when Gaspard Rodriguez and Philip Guttierrez were executed, though equally guilty with them, and although all his officers had urged him to put Centeno to death. In addition, Gonzalo made high offers to Centeno, promising to accede to every demand he might choose to make, if he would now join him. He sent this letter to Centeno by a person named Francisco Vaso, who immediately offered his services to Centeno, to whom he intimated that Diego Alvarez his standard-bearer was in correspondence with Gonzalo. Centeno was already informed of this circumstance by Alvarez himself, who assured him he had entered into this correspondence for a quite different purpose than that of betraying him or the royal cause.