In 1639, when it might have seemed to him that Fortune had already done her worst to plague him, and he had no more either to hope or fear from kings or ministers, there happened to Quevedo the worst of all the calamities which marked his busy and troubled life. A satirical sonnet was found under the King's napkin at supper, which contained violent reflections on the Government of the Count-Duke Olivares. Quevedo was believed to be the author, and, without any inquiry or trial, he was seized at dead of night, in the Duke of Medina Celi's palace, and hurried off to a dungeon under the cells of the Royal Convent of San Marcos at Leon. Here he was kept in strict confinement for nearly four years, in spite of a pitiful appeal to Olivares, in which, while protesting his innocence of the offence imputed to him, Quevedo wrote: _No clemency can add many years to my life; no rigour can take many away_. He was asked to declare which of the many satires there were going about were his and which were not, but he returned a proud and disdainful answer. The real author of the lampoon for which Quevedo was punished was discovered soon after, but this made little or no difference in the treatment to which he was subjected. In vain did he entreat the Count-Duke for justice and relief. He pleaded that he was blind of the left eye, crippled, and afflicted with ulcers, declaring that he sought not liberty but change of regimen and of prison, _and this change, the gospel says, Christ granted to a great number of devils who besought it of Him_. In vain were all these pleas. They were probably glad to be able to silence, on any pretext, that bold and biting tongue, which had already done so much to proclaim to posterity the iniquities of the Government. It was not until after the fall of the Count-Duke himself, amidst the rejoicings of the whole nation, that Quevedo was restored to liberty. But his four years' imprisonment, during part of which time he had been treated, as he complains, _like a wild beast_ shut up alone without human intercourse, had ruined his health and broken his spirits. His estate had been sequestrated, and he was never able to recover more than a small part of it, so that poverty was added, for the first time in his life, to his other trials. Worn out by his infirmities, he died at last, of an imposthume in the chest, contracted during his imprisonment in a damp cell of the Convent, on the 8th of September, 1645, having previously made his peace with God and the Church in the usual manner.