When Gonzalo Pizarro was informed of what had been done by Centeno in the province of Las Charcas against his interest and authority, he believed it necessary to use prompt measures for reducing that country to subjection, and not to give his enemies time and opportunity for strengthening themselves and increasing the number of their partizans; as he flattered himself that he would become absolute master of the whole kingdom of Peru, if he were able to get rid of Centeno. After several consultations with the principal officers of his army, on the measures necessary to be pursued on this emergency, in which Gonzalo could not act in person as he had still to oppose the viceroy in the north, it was determined to confide the care of an expedition against Centeno to the lieutenant-general Carvajal. For this purpose all the necessary orders and commissions were made out immediately in the name of Gonzalo Pizarro, by which Carvajal was authorized to levy what men and money he might deem necessary. This employment was very acceptable to Carvajal, as he believed he might derive considerable profit to himself in its execution; and he set out from Quito accompanied only by twenty persons, in whom he had great confidence. The council of Gonzalo Pizarro had other and secret motives for recommending the employment of Carvajal on this occasion, besides those which they publickly avowed. Some were desirous of acquiring by his absence a greater share in the management of affairs; while others were anxious to send him to a distance, from the terror inspired by his cruel and ferocious conduct, and his passionate temper, owing to which he used often to put people to death on the most trifling offences or the slightest suspicions. But all the leaders in the army disguised their real sentiments on this occasion, pretending that the importance of the affair required the talents and experience of Carvajal to bring it to a successful issue.
Leaving Quito, Carvajal went, directly to San Miguel, where the principal inhabitants went out to meet him, and conducted him with much respect to the house which was prepared for his reception. On arriving there, he desired six of the most considerable persons belonging to the city to dismount and accompany him into the house, under pretence that he had something of importance to communicate to them from the governor. Having caused the doors to be shut, and posted centinels to prevent any communication with the rest of the inhabitants, he represented to these men, that Gonzalo was much incensed against them for having always taken part with his enemies, and more especially on account of having received and favoured the deposed viceroy, and of having readily supplied his army with every thing of which they stood in need. On this account it had been his first intention to have destroyed the city with fire and sword, without sparing a single inhabitant. But, on reflecting that the magistrates and principal inhabitants only were to blame, the people at large having been constrained by force or fear, he was now determined to punish only the most guilty and to pardon the rest. Yet, having certain private reasons for dissembling for the present with some of the principal persons of the place, he had selected the six who were now present, as principal inhabitants, to punish them as they richly deserved, that they might serve as a warning to all Peru. For this reason, therefore, he desired them to confess their sins in preparation for death, as he was resolved to have them all executed immediately.
They used every argument to exculpate themselves from the crimes kid to their charge, but all they could say was without avail; and Carvajal even caused one of them to be strangled, against whom he was particularly incensed, as he had been principally instrumental in constructing the royal seal which the viceroy employed in his dispatches. In the mean time, a rumour of what was going forward at the residence of Carvajal spread over the city, and came to the knowledge of the wives of the prisoners. These ladies immediately implored the priests and monks who dwelt in San Miguel to accompany them to the place where their husbands were in so great danger. They all went there accordingly, and got in by a private door which had not been noticed by the people belonging to Carvajal, and which had consequently been omitted to be guarded. Coming into the presence of Carvajal, the wives of the prisoners threw themselves at his feet, and implored mercy for their husbands. He pretended to be softened, and granted pardon to the prisoners, so far as their lives; yet reserving to himself to punish them in such other manner as he might see fit. Accordingly, he banished them from the province, depriving them of their lands and Indians, and condemned them in the payment of heavy fines towards defraying the expences of the war.
From San Miguel Carvajal went to Truxillo, collecting every where on his route all the soldiers, horses, arms, and money he could find. Carvajal had resolved to have put one Melchior Verdugo to death, who dwelt in Truxillo; but as Verdugo got intimation of this intention, he fled to the province of Caxamarca, where his repartimiento of Indians was situated. The bussiness on which Carvajal was engaged was of too great importance to admit of pursuing Verdugo; wherefore, after having got possession of as much money as possible under pretence of a loan, he went on to Lima, always collecting all the soldiers he could procure. He gave no money to his recruits, only supplying them with horses and arms, which he took wherever they could be found. He kept all the money he could find for his own use, every where pillaging the royal coffers and public funds, and even searching for treasure among the ancient tombs. After arriving at Lima, he completed his military preparations, and departed for Cuzco by way of the mountain and the city of Guamanga, at the head of two hundred men well equipped, and carrying with him a great sum of money which he had collected during his march; and at Guamanga he conducted himself in the same rapacious manner as in other places.
Seven or eight days after the departure of Carvajal from Lima, a conspiracy was detected among those who were well affected to the royal cause, in consequence of which fifteen of the principal persons of that city were committed to prison. Among these were, Juan Velasquez, Vela Nunnez nephew to the viceroy, Francisco Giron another gentlemen of his household, and Francisco Rodriguez. By means of the torture, these unhappy persons were made to confess that they had concerted with Pedro Manxarres, an inhabitant of Las Charcas, to kill the lieutenant-governor Aldana, the provost marshall Pedro Martin, and other friends and partizans of Gonzalo Pizarro, after which they proposed to induce the citizens of Lima to declare for his majesty, confidently expecting that all those who now followed Carvajal by constraint would join their party; and they intended finally to have gone off with all the strength they could muster to join Centeno. Upon this forced confession, Giron and one other of these prisoners were strangled. By the intercession of several respectable persons the life of Juan Velasquez was spared, but his right hand was cut off. All the rest of these prisoners were so severely tortured that they continued lame for the rest of their lives. Manxarres saved himself by flight, and continued to conceal himself among the mountains for more than a year; but fell at last into the hands of one of the officers in the interest of Gonzalo, who caused him to be hanged.
As Pedro Martin, the provost-marshal, strongly suspected that some of those who accompanied Carvajal had participated in this plot; he endeavoured to discover this by torturing Francisco de Guzman, one of the prisoners. Finding that Guzman made no confession on this head, he interrogated him particularly respecting a soldier along with Carvajal named Perucho de Aguira, and some of his friends, demanding to know whether these men were in the secret. On purpose to free himself from the torture, Guzman said they were. After this confession, Guzman was formally condemned to become a monk in the convent belonging to the order of mercy, in which he accordingly assumed the habit. After this, Martin demanded from the registrar a certificate of the confession of Guzman, by which Aguira and others were implicated in the plot, and Martin immediately sent off this writing by an Indian messenger to Carvajal who was then at Guamanga. On the receipt of this paper, Carvajal ordered Aguira and five others to be hanged, without any further proof or examination. A short time afterwards, the registrar being sensible of the error he had committed in supplying the certificate, sent off a full copy of the confession made by Guzman, in which was an ample revocation of all he had said under torture, declaring that he had falsely charged Aguira and the others, merely to get free from torture. This was however of no avail, as it arrived too late, Aguira and the others having been already executed, although they asserted their innocence to the last moment of their lives, as was certified by the confessors who attended them at their execution; but Carvajal was inexorable.