William Prescott 
The Conquest of Peru 

The most brilliant passages in the history of Spanish adventure in the New World are undoubtedly afforded by the conquests of Mexico and Peru, – the two states which combined with the largest extent of empire a refined social polity, and considerable progress in the arts of civilization. Indeed, so prominently do they stand out on the great canvas of history, that the name of the one, notwithstanding the contrast they exhibit in their respective institutions, most naturally suggests that of the other; and, when I sent to Spain to collect materials for an account of the Conquest of Mexico, I included in my researches those relating to the Conquest of Peru.