Germans, 7 Russians, 2 Dutchmen, 1 Frenchman and 1 Austrian. In subsequent available censuses the population was 1337 (24 April 1921), and 709 (26 April 1931, includes the South Shetland Islands). Managers and other senior officers of the whaling stations often lived together with their families. Among them was Fridthjof Jacobsen whose wife Klara Olette Jacobsen gave birth to two of their children in Grytviken; their daughter Solveig Gunbjörg Jacobsen was the first child ever born in Antarctica, on 8 October 1913. Several more children were born on South Georgia, even recently aboard visiting private yachts. There are some 200 graves on the island dating from 1820 onwards, including that of the famous Antarctic explorer Sir Ernest Shackleton (died 1922) whose British Antarctic Expedition (1908–09) established the route to the South Pole subsequently followed by Robert Scott. In one of the most remarkable small boat journeys in maritime history (probably rivalled only by that of Bounty's Lieutenant William Bligh), in 1916 Shackleton crossed Scotia Sea in the 7 m or 23' James Caird to reach South Georgia and organise the successful rescue of his expedition team stranded on Elephant Island following the loss of their ship Endurance. In the process, Shackleton accompanied by Frank Worsley and Tom Crean trekked the island's glaciated and rugged terrain between King Haakon Bay and the Stromness whaling station. Another Antarctic explorer with a special place in South Georgia's history was Duncan Carse. His comprehensive 1951–57 South Georgia Survey resulted in the classical 1:200000 topographic map of South Georgia, occasionally updated but never superseded since its first publication by the British Directorate of Overseas Surveys in 1958. For several months in 1961, Carse experimented on living alone at a remote location, Ducloz Head on the southwest coast of the island. Mount Carse, the island's third highest peak is named for him. A magistrate conducting the local British administration has been residing in South Georgia ever since November 1909 (except for 22 days in 1982). The 1908 British Letters Patent was transmitted to the Argentine Foreign Ministry and was formally acknowledged on 18 March 1909 without objections. Argentina also recognised de facto the British permanent local administration set up in 1909, with commercial and naval Argentine vessels that visited the island in the subsequent years duly complying with normal harbour, customs, immigration and other procedures. During the Second World War the whaling stations were closed excepting