rebuking him for referring trivial matters back to the king and Council, criticising him for his inability to refuse a favour to anyone who asks for one, and hinting that Lady Lisle's dominant influence over him has made him something of a laughing stock. Yet the Crown itself did not hesitate to employ him on routine errands: in 1537 queen consort Jane Seymour during her pregnancy developed a passion for quail, and since quail were abundant in the marshes around Calais, Lisle had to devote much time to supplying them to the Queen. Imprisonment and death In 1540, several members of the Plantagenet household in Calais were arrested on suspicion of treason, on the charge of plotting to betray the town to the French. Suspicion unavoidably fell upon Arthur as well, and he was recalled to England and eventually arrested on 19 May 1540. The actual conspirators were executed, but there was no evidence connecting Arthur with the plot. Nevertheless, he languished in the Tower of London for two years until the king decided to release him. However, upon receiving news that he was to be released he suffered a heart attack and died two days later. The 18th-century historian Francis Sanford commented "Henry VIII's Mercy was as fatal as his Judgments". Lisle Letters During his time in Calais, Arthur and his wife had to manage much of their affairs outside Calais by correspondence. Copies of 3,000 of these letters were seized as evidence after Arthur was arrested. They survive in the Public Record Office, and were published in abridged form as the Lisle Letters, becoming a valuable historical resource for a critical period in English history. Marriages and children Arthur Plantagenet married twice, producing children by his first wife only. His first marriage was on 12 November 1511 to Elizabeth Grey (died 1529), daughter of Edward Grey, 1st Viscount Lisle (died 1492). She was the widow of Edmund Dudley, treasurer to King Henry VII, who had been executed in 1510 by Henry VIII. The next day the king granted Arthur some of the Dudley estates which had come to the crown due to Dudley's attainder. By Elizabeth he had three daughters: Frances, who married twice: firstly to her step-brother John Basset (1520–1541) of Umberleigh, Devon, the son of Arthur's second wife by her first marriage, Honor Grenville (died 1566); secondly Frances married Thomas Monke (c. 1515 – c. 1583)