The Spaniards in Cuzco, startled by the appearance of this fresh body of troops in their neighborhood, doubted, when they learned the quarter whence they came, whether it betided them good or evil. Hernando Pizarro marched out of the city with a small force, and, drawing near to Urcos, heard with no little uneasiness of Almagro's purpose to insist on his pretensions to Cuzco. Though much inferior in strength to his rival, he determined to resist him. Meanwhile, the Peruvians, who had witnessed the conference between the soldiers of the opposite camps, suspected some secret understanding between the parties, which would compromise the safety of the Inca. They communicated their distrust to Manco, and the latter, adopting the same sentiments, or perhaps, from the first, meditating a surprise of the Spaniards, suddenly fell upon the latter in the valley of Yucay with a body of fifteen thousand men. But the veterans of Chili were too familiar with Indian tactics to be taken by surprise. And though a sharp engagement ensued, which lasted more than an hour, in which Orgonez had a horse killed under him, the natives were finally driven back with great slaughter, and the Inca was so far crippled by the blow, that he was not likely for the present to give further molestation.8 Almagro, now joining the division left at Urcos, saw no further impediment to his operations on Cuzco. He sent, at once, an embassy to the municipality of the place, requiring the recognition of him as its lawful governor, and presenting at the same time a copy of his credentials from the Crown. But the question of jurisdiction was not one easy to be settled, depending, as it did, on a knowledge of the true parallels of latitude, not very likely to be possessed by the rude followers of Pizarro. The royal grant had placed under his jurisdiction all the country extending two hundred and seventy leagues south of the river at Santiago, situated one degree and twenty minutes north of the equator. Two hundred and seventy leagues on the meridian, by our measurement, would fall more than a degree short of Cuzco, and, indeed, would barely include the city of Lima itself. But the Spanish leagues, of only seventeen and a half to a degree,9 would remove the southern boundary to nearly half a degree beyond the capital of the Incas, which would thus fall within the jurisdiction of Pizarro.10 Yet the division-line ran so close to the disputed ground, that the true result might reasonably be doubted, where no careful scientific observations had been made to obtain it; and each party was prompt to assert, as they always are in such cases, that its own claim was clear and unquestionable.11