While in Granada such discouraging conditions prevailed, those portions of the kingdom which had unwillingly received the banished Moriscoes experienced the beneficial results of their labors. The hitherto barren regions of La Mancha and Estremadura began to exhibit signs of unexampled fertility. The new settlers were peaceable, frugal, industrious. In Castile they were generally farmers; in Aragon, merchants; in Valencia, manufacturers. Not a few attained great distinction in the practice of medicine and surgery; and, like the Jews of former ages, they were frequently employed by the court and the family of the sovereign. The life of Philip III. when a child was saved by the skill of a Moorish physician, a service which was ill-requited by the deeds of his manhood. The exiles practically contributed the funds which supported the monarchy. The insatiable rapacity of adventurers had soon exhausted the available wealth of a magnificent colonial empire. Official corruption constantly drained the ordinary sources of revenue. In all financial difficulties taxation of the Moriscoes afforded an unfailing and profitable means of replenishing the treasury. Their burdens were first doubled, then quadrupled. Every species of imposition was practised upon them. Their debtors paid them in spurious coin, struck for their benefit. False jewels were pledged with them for loans. The chicanery of the law was employed to defraud them with impunity, while the most severe penalties were inflicted upon them for trifling breaches of trust. They were systematically swindled by cheats and usurers. In all possible ways they were made to feel the unmerited degradation of their caste and the utter hopelessness of relief. Yet under this weight of malevolence and injustice they prospered and preserved at least the appearance of equanimity. Nothing could, with truth, be alleged against their morals. They were nominally good Christians. They attended mass. They conformed to the customs of their rulers, wore their dress, participated in their festivals, spoke Castilian. Their regular and temperate lives and their buoyant spirits under misfortune promoted extraordinary longevity. It was by no means unusual to encounter individuals whose age had passed the limit of a century. Early marriages and polygamous unions caused the population to increase with amazing rapidity. The census taken regularly by the Moriscoes to ascertain the proportion of taxes to be levied upon them and to insure its equitable distribution demonstrated conclusively that this growth was in a progressive ratio that was phenomenal in its character. The enumeration made at Valencia in 1602 showed an increase of ten thousand in three years. Modern investigation has established the fact that a population existing under the most favorable economic conditions will double itself every twenty-five years. The Moriscoes were far exceeding that estimate, for their rate of increase was triple.