As soon as Ulfeldt heard that the Brandenburg Government had betrayed him, and that sentence had been passed on him in Copenhagen, he left Bruges. No doubt the arrest of Leonora in England was a still greater blow to him. The Spanish Government would probably have surrendered him to the Danish authorities, and he had to flee from place to place, pursued by Danish agents demanding his extradition, and men anxious to earn the reward offered for his apprehension, dead or alive. His last abode was Basle, where he passed under a feigned name, until a quarrel between one of his sons and a stranger caused the discovery of their secret. Not feeling himself safe, Ulfeldt left Basle, alone, at night, in a boat descending the Rhine; but he never reached his destination. He was labouring under a violent attack on the chest, and the night air killed him. He breathed his last in the boat, on February 20, 1664. The boatmen, concluding from the gold and jewels which they found on him that he was a person of consequence, brought the body on shore, and made the matter known in Basle, from whence his sons came and buried him under a tree in a field--no one knows the spot. Meanwhile the punishment of beheading and quartering had been executed on a wooden effigy in Copenhagen. His palace was demolished, and the site laid out in a public square, on which a pillar of sandstone was erected as an everlasting monument of his crimes. This pillar was taken away in 1842, and the name was changed from Ulfeldt Square to Greyfriars Square, as an indication of the forgetting and forgiving spirit of the time, or perhaps rather because the treason of Ulfeldt was closely connected with the ancient jealousy between Danes and Swedes, of which the present generation is so anxious to efface the traces. His children had to seek new homes elsewhere. Christian, who killed Fuchs, became a Roman Catholic and died as an abbe; and none of them continued the name, except the youngest son Leo, who went into the service of the German Emperor, and rose to the highest dignities. His son Corfits likewise filled important offices under Charles VI. and Maria Theresa, but left no sons. His two daughters married respectively a Count Waldstein and a Count Thun, whose descendants therefore now represent the family of Ulfeldt. Leonora Christina remained in prison for twenty-two years--that is, until the death of Sophia Amalia, the Queen of Fredrik III. This King, as well as his son Christian V., would willingly have set her at liberty; but the influence of the Queen over her husband and son was so strong that only her death, which occurred in 1685, released Leonora.