Gonzalo used every effort to collect provisions and all kinds of necessaries for his army, more especially as he had to pass through a desert country which intervened between the province of Motupe15 and the city of San Miguel, a distance of twenty-two leagues without any inhabitants, and entirely destitute of water or other means of refreshment, consisting every where of burning sands without shelter from the heat of the sun and almost under the equinoctial line. As this march was necessarily attended with much inconvenience and difficulty, Gonzalo used every proper precaution that his troops might be supplied abundantly with water and other necessaries. For this purpose all the neighbouring Indians were ordered to bring a prodigious quantity of jars and other vessels calculated to contain water. The soldiers were ordered to leave at Motupe all their clothes and baggage of which they were not in immediate want, which were to be brought forward by the Indians. Above all things, it was taken care that a sufficiency of water should accompany the army, both for the troops, and for the horses and other animals. Every thing being in readiness, Gonzalo sent forwards a party of twenty-five horsemen by the ordinary road through the desert, that they might be observed by the scouts belonging to the viceroy, and that he might be led to believe the army came in that direction. He then took a different route through the same desert with the army, marching as expeditiously as possible, every soldier being ordered to carry his provisions along with him on his horse. By these precautions, and the rapidity of the march, the viceroy was not informed of the approach of Gonzalo and his army, till they were very near San Miguel. Immediately on learning their approach, he sounded the alarm, giving out that he intended to meet and give battle to the insurgents; but as soon as his army was drawn out from the city, he took a quite opposite course, directing his march with all possible expedition towards the mountain of Caxas.

Gonzalo Pizarro got notice of the retreat of the viceroy about four hours afterwards, in consequence of which he made no halt at San Miguel, except to procure guides to direct him in the road which the viceroy had taken. In the first night of this pursuit, the army of Gonzalo marched eight Spanish leagues, or near thirty English miles, and several of the royalists who had lagged behind the rest, together with the whole baggage belonging to the retreating army fell into his hands. Gonzalo hanged such of his prisoners as were most obnoxious to him, and continued the pursuit of the flying royalists with the utmost diligence, through difficult and almost impracticable roads, where no provisions could be procured, always coming up with some of the hindmost of the enemy. Gonzalo likewise sent on several Indians with letters to the principal officers who served under the viceroy, urging them to put him to death, and offering them their pardons for the past and to give them high rewards. He continued the pursuit above fifty leagues or two hundred miles, till at length the horses were no longer able to carry their riders, and the men were incapable of proceeding, both from excessive fatigue and by the failure of provisions. The insurgent army at length arrived at Ayabaca16, where the hot pursuit of the viceroy was discontinued, and the troops of Gonzalo halted for rest and refreshment. Besides the difficulty of overtaking the royalists, Gonzalo had received assurances from some of the principal followers of the viceroy that they would either put him to death, or deliver him up as a prisoner; and, as this came afterwards to the knowledge of the viceroy, he put several of these officers and gentlemen of his army to death. After Gonzalo had supplied his army with such provisions as could be furnished at Ayabaca, he resumed the pursuit, but with less rapidity than before, and keeping his army always in compact order; yet at this time some of his troops remained behind, partly owing to extreme fatigue, and partly from discontent. Leaving the viceroy to continue his retreat to Quito, and Gonzalo in pursuit, it is proper to mention some events that occurred at this time in other parts of Peru.

In this march, Gonzalo did not think proper to carry along with his army any of the soldiers belonging to the viceroy whom he had taken during the pursuit, both because he could not confide in them, because he had already a sufficient force in proportion to the enemy, and because provisions were very difficult to be procured, as the viceroy had stripped every place through which he passed as much as possible. For this reason, Gonzalo Pizarro sent back all his prisoners to Truxillo, Lima, or such other places as they thought proper, having in the first place put to death such of their chiefs as he considered most strongly attached to the viceroy. As these soldiers were dispersed over several parts of the country, they began to declaim in favour of the viceroy and against the tyrannical conduct of Gonzalo, and found many persons abundantly disposed to listen to their harangues; both because what they alleged was true in itself, and because most of the Spanish inhabitants of Peru were much inclined to revolution and change of party, especially the soldiery and those who were lazy and unoccupied. The real settlers and principal inhabitants of the cities were quite of an opposite description, being friends of peace and order, as most conducive to their interest and happiness, and necessary to the preservation of their properties, and being more exposed in time of civil war than even the soldiers to be harassed and tormented in many ways, as the ruling party was apt on the slightest pretexts to put them to death on purpose to seize their effects, with which to gratify and reward the partizans of their tyranny and injustice. These seditious discourses were so openly indulged in, that they reached the knowledge of the lieutenants of Gonzalo; who, each in his peculiar jurisdiction, punished the authors as they deemed right. At Lima, to which most of these prisoners had gone, Pedro Martin de Cecilia the provost marshal was a violent partizan of Gonzalo, and caused several of these malecontents to be hanged. Lorenzo de Aldana, who had been left by Gonzalo as lieutenant-governor of Lima, was a prudent man, and conducted himself in a quite different manner, being disinclined from acting with such violence as might occasion displeasure to either party in the sequel; for which reason he used all his influence to prevent putting any one to death, or from injuring any person in any manner. Although he held his office from Gonzalo, he never exerted himself zealously in his service, so that the partizans of that usurper considered him as secretly gained by the other party, more especially as he always behaved well to the known friends of the viceroy. On this account, all these men flocked to Lima, where they believed themselves in greater security than anywhere else. The partizans of Gonzalo, on the other hand, made loud complaints against the favourable behaviour of Aldana to the royalists; and in particular one of the alcaldes of Lima, named Christopher de Burgos, spoke of it so openly that Aldana thought it necessary to give him a public reprimand, and even committed him to prison for some time. Several even went so far as to communicate their suspicions of the fidelity of Aldana to Gonzalo Pizarro by letters, and even persuaded him of the truth of their allegations: But he refrained from manifesting his want of confidence in the lieutenant-governor, considering it dangerous to deprive him of his office while the army was at so great a distance, more especially as Aldana had a respectable military force, and was much esteemed by the citizens of Lima.