Events January–March January 5 – King Charles II of England gives the title Duke of St Albans to Charles Beauclerk, his illegitimate son by Nell Gwyn. January 15 (January 5 O.S.) - To demonstrate that the River Thames, frozen solid during the Great Frost that started in December, is safe to walk upon, "a Coach and six horses drove over the Thames for a wager" and within three days "whole streets of Booths are built on the Thames and thousands of people are continually walking thereon." Sir Richard Newdigate, 2nd Baronet, records the events in his diary. January 26 – Marcantonio Giustinian is elected Doge of Venice. January – Edmond Halley, Christopher Wren and Robert Hooke have a conversation in which Hooke later claimed not only to have derived the inverse-square law, but also all the laws of planetary motion attributed to Sir Isaac Newton. Hooke's claim is that in a letter to Newton on 6 January 1680, he first stated the inverse-square law. February 7 – Morocco retakes control of the city of Tangier from England, which had controlled the North African port since 1661. During the five months prior to evacuation of the English from the city, the Governor, Lord Dartmouth had ordered the destruction of the wall around the city, its fortifications and port facilities that had been built by the English during the occupation. February 8 – Prince Dumitrașcu Cantacuzino returns to the throne of the principality of Moldavia for a third reign but is overthrown 14 months later on June 25. In 1859, Moldavia will unite with neighboring Wallachia to form the Kingdom of Romania. February 15 (February 5 O.S.) – The Great Frost in Britain, during which the River Thames was frozen in London and the sea as far as out from land and which started the previous December, ends as the Thames begins to thaw. William Maitland later writes that the Frost, which started in December 1683, "congealed the river Thames to that degree that another city, as it were, was erected thereon; where by the great number of streets and shops, with their rich furniture, it represented a great fair, with a variety of carriages, and diversions of all sorts." During the freeze, there had been great loss of beast and of wildlife, especially birds, and similar reports from across Northern Europe. The Chipperfield's Circus dynasty began during the freeze, with James