In his fifty-second year Calderon took holy orders, but did not on that account totally relinquish his previous occupations. From that time, however, he applied himself with more particular assiduity to the composition of his _Autos Sacramentales_, which soon superseded throughout the whole of Spain all the older dramas of this class. Calderon lived to an advanced age, admired by his countrymen, and amply rewarded by ecclesiastical dignities, pensions and presents, from his sovereign. In the estimation of the public, his dramas surpassed those of every preceding and contemporary writer. But in his old age, he himself attached but little importance to his temporal productions. The Duke of Veragua addressed to him a flattering letter, requesting to be furnished with a complete list of his dramas, because the booksellers were in the habit of selling the works of other writers under his name. In reply, Calderon, who was then in his eightieth year, supplied the duke only with the list of his _Autos Sacramentales_. He added in a letter, that with regard to his temporal dramas, he felt offended, that in addition to his own faulty works, those of other authors should be circulated in his name; and besides that, his writings were so altered that he himself could not recognize even their titles. He also expressed his determination to follow the example of the booksellers, and to pay as little regard to his plays as they did; but he observed, that on religious grounds he attached more importance to his Autos.[530] Calderon died in 1687, in the eighty-seventh year of his age. Several collections of his dramas appeared during his life, and among the rest one published by his brother, Joseph Calderon, in 1640, but none were edited by the author himself. In the great edition of the collected comedies of Calderon, which his friend Juan de Vera Tassis y Villaroel began to superintend in 1685, the poet, who was then eighty-five years of age, can scarcely be expected to have indirectly participated even so far as was necessary to certify the authenticity of the component parts. It is therefore questionable whether the hundred and twenty-seven plays, published in Calderon’s name, be all genuine. This doubt may indeed be hazarded with the greater probability, as Juan de Vera Tassis, who undertook to publish the complete collection of Calderon’s dramas, estimates the number of his Autos at ninety-five; while Calderon himself, in his conscientious list furnished to the Duke of Veragua, states their number to be only sixty-eight, including those not printed. It can scarcely be believed that Calderon wrote twenty-seven Autos after he had attained the age of eighty.[531]