Wiencke Island in search of Jean-Baptiste Charcot, whose French Antarctic Expedition (1903–1905) was believed to be lost. Thanks to the Argentine collaboration with his expedition, Charcot named an insular group as Argentine Islands. One of these islands was named as Galindez Island in honor of the captain of the Corvette, Ismael Galíndez, and another was named Uruguay Island, in homage to the Argentine Corvette. The Argentine Government decided to add two meteorological observatories, in the South Georgia Island and Wandel Island, who already had on the islands Laurie and Observatorio (near Isla de los Estados). Expeditions to Wandel Island failed in two attempts. In June 1905 the transport ARA Guardia Nacional under the command of the Lieutenant Alfredo P. Lamas carried forward the task of raising the Observatory in Grytviken in Cumberland Bay, renamed in Spanish Bahía Guardia Nacional. On 30 March 1927, the first radiotelegraph station in Antarctica was inaugurated in the South Orkney Islands. On 15 December 1927, the General Directorate of Post and Telegraph from Argentina informed the International Bureau of the Universal Postal Union about their Antarctic claims and other islands of the South Atlantic. In 1939, Argentina created temporarily (to attend a Norwegian invitation) the National Commission of the Antarctic by Decree No. 35821, but by the Decree No. 61852 of 30 April 1940 became a permanent body in order to intensify research in the area. Explorations, scientific tasks, were gathering ground and marking. In October 1941, the Instituto Geográfico Militar published maps showing the extent of the future Argentine claim between the 25° W and 75° W. In January 1942 the Argentine Government, according to the sector theory, said their Antarctic rights between the Meridian 25° and 68°24' West (of Punta Dúngeness). On 8 November 1942 Argentina laid claim to Antarctic land when an expedition under the command of the captain Alberto J. Oddera placed a cylinder containing a report and a flag on Deception Island. In January 1943 the British ship HMS Carnarvon Castle crew destroyed the evidence of the Argentine inauguration and planted the British flag. On 5 March of the same year the Argentine vessel ARA 1° de Mayo removed the British flag. In 1946, the National Antarctic Commission set new limits for Argentine Antarctica between the Meridian 25° and 74° West (of the far east of the South Sandwich Islands). Chile and Argentina signed on 4 March 1948 a mutual