fails and Zrinski and his brother-in-law, Krsto Frankopan, are quickly arrested. Both are beheaded in Vienna on April 30, 1671. March 31 – The British warship HMS Sapphire is wrecked beyond repair when her captain, John Pearce, orders the ship to be run aground at Sicily while fleeing what he believes to be four Algerian pirate ships, rather than attempting to fight. The ships turn out to have been friendly, and Pearce and his lieutenant, Andrew Logan, are court-martialed for their cowardice and executed on September 17. April–June April 18 – King Christian V of Denmark fires Christoffer Gabel, who had been the corrupt chief adviser to King Frederick III, and replaces him with Peder Griffenfeld. April 29 – After more than four months, the papal conclave to elect a successor to the late Pope Clement IX selects Cardinal Emilio Albieri with 56 of the 59 votes. Altieri, 79 years old at the time, remains the oldest person ever to be elected pope. He announces that he will take the name of Pope Clement X in honor of Clement IX, who had made him a cardinal. He serves for six years until his death in 1676 shortly after his 86th birthday. May 2 – The Hudson's Bay Company is granted a royal charter in England with the jurisdiction to control administration and commerce in "Rupert's Land", governed for the crown by Rupert, Duke of Cumberland, the cousin of King Charles II. The land is a 1.5 million square mile area of what is now Canada around Hudson Bay. The area controlled covers all of the modern province of Manitoba, most of Saskatchewan, and significant portions of Alberta and Nunavut, as well as parts of what are now Ontario and Quebec, and parts of the U.S. states of Minnesota, North Dakota and Montana. May 23 – Cosimo III de' Medici becomes the Grand Duke of Tuscany, at the time an independent nation in Italy, upon the death of his father Ferdinando de' Medici. June 1 – At Dover, England, Charles II of England and Louis XIV of France sign the Secret Treaty of Dover, ending hostilities between their kingdoms. Louis will give Charles 200,000 pounds annually. In return Charles will relax the laws against Catholics, gradually re-Catholicize England, support French policy against the Dutch Republic (leading England into the Third Anglo-Dutch War), and convert to Catholicism himself. The treaty is ratified