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 Ayabaca[16], 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. [Footnote 16: Notwithstanding the distance mentioned in the text, Ayabaca is only about 60 miles, or fifteen Spanish leagues in a straight line N.N.E. from San Miguel.--E.]