Question: What was the nickname of the Australian pioneer aviator who owned the Lady Southern Cross monoplane and made a flight from Austraia to London in a record 10.5 days??

full_context: Document 1: Southern Cross (aircraft): Southern Cross is the name of the Fokker F.VIIb/3m trimotor monoplane that in 1928 was flown by Australian aviator Sir Charles Kingsford Smith, Charles Ulm, Harry Lyon and James Warner in the first-ever trans-Pacific flight to Australia from the mainland United States, a distance of about 7250 mi .
Document 2: Southern Cross Route: Southern Cross Route is a term for passenger flights from Australasia to Europe via the Western Hemisphere. The Kangaroo route is its counterpart running through the Eastern Hemisphere, with many more flights. Both terms were invented by airlines when they started flying the two routes (Qantas on the Kangaroo Route, British Commonwealth Pacific Airlines on the Southern Cross), so they have no "official" definitions; probably no airline has ever described a route from Europe to Australasia via South America as "the Southern Cross Route". (And BCPA/Qantas called it the "Southern Cross Route" when it only extended from Australia to Vancouver, before 1958.)
Document 3: Beryl Markham: Beryl Markham (née Clutterbuck, 26 October 1902 – 3 August 1986) was a British-born Kenyan aviator (one of the first bush pilots), adventurer, racehorse trainer and author. She was the first woman to fly solo across the Atlantic from east to west. She wrote about her adventures in her memoir, "West with the Night".
Document 4: Lady Southern Cross: The Lady Southern Cross was a Lockheed Altair monoplane owned by Australian pioneer aviator Sir Charles Kingsford Smith.
Document 5: Lowell Smith: Lowell Herbert Smith (October 8, 1892—November 4, 1945) was a pioneer American airman who piloted the first airplane to receive a complete mid-air refueling (along with Lt. John P. Richter) on June 27, 1923, and later set an endurance record of 37 hours on August 28, both in a De Havilland DH-4B. Smith also piloted the Douglas World Cruiser "Chicago", which along with one other made the first aerial circumnavigation in 1924. Smith held 16 records for military aircraft in speed, endurance and distance. He was awarded the best achievement in flight Mackay Trophy twice.
Document 6: Daily Mail aviation prizes: Between 1907 and 1925, the Daily Mail newspaper, initially on the initiative of its proprietor, Alfred Harmsworth, 1st Viscount Northcliffe, awarded numerous prizes for achievements in aviation. The newspaper would stipulate the amount of a prize for the first aviators to perform a particular task in aviation, or to the winner of an aviation race or event. The most famous prizes were the £1,000 for the first cross-channel flight awarded to Louis Blériot in 1909 and the £10,000 given in 1919 to Alcock and Brown for the first non-stop transatlantic flight between North America and Ireland.
Document 7: Charles Kingsford Smith: Sir Charles Edward Kingsford Smith MC, AFC (9 February 1897 – 8 November 1935), often called by his nickname "Smithy", was an early Australian aviator. In 1928, he earned global fame when he made the first trans-Pacific flight from the United States to Australia. He also made the first non-stop crossing of the Australian mainland, the first flights between Australia and New Zealand, and the first eastward Pacific crossing from Australia to the United States. He also made a flight from Australia to London, setting a new record of 10.5 days.
Document 8: Clyde Pangborn: Clyde Edward Pangborn ("c". October 28, 1895 – March 29, 1958) also known as "Upside-Down Pangborn" was an American aviator and barnstormer who performed aerial stunts in the 1920s. In 1931 Pangborn and co-pilot Hugh Herndon, Jr. flew their plane, "Miss Veedol", on the first non-stop flight across the Pacific Ocean.
Document 9: Southern Aurora: The Southern Aurora was an overnight express passenger train that operated between Australia's two largest cities, Sydney and Melbourne. First-class throughout, including the dining facilities, the "Southern Aurora" featured all-sleeper accommodation. The train first ran on 16 April 1962 after the opening of the North East standard gauge line from Melbourne to Albury, eliminating the break-of-gauge between the capital cities.
Document 10: Smithy (1946 film): Smithy (aka Southern Cross and Pacific Adventure) is a 1946 Australian adventure film about pioneering Australian aviator Sir Charles Kingsford Smith and his 1928 flight across the Pacific Ocean, from San Francisco, California, United States to Brisbane, Queensland, Australia . This was the first-ever transpacific flight. Kingsford Smith was the pilot of the Fokker F.VII/3m three-engine monoplane ""Southern Cross"", with Australian aviator Charles Ulm as the relief pilot. The other two crew members were Americans James Warner and Harry Lyon.
Document 11: Charles Lindbergh: Charles Augustus Lindbergh (February 4, 1902 – August 26, 1974), nicknamed Slim, Lucky Lindy, and The Lone Eagle, was an American aviator, military officer, author, inventor, explorer, and environmental activist. At age 25 in 1927, he went from obscurity as a U.S. Air Mail pilot to instantaneous world fame by making his Orteig Prizewinning nonstop flight from Long Island, New York, to Paris. He covered the 33 ⁄ -hour, 3,600 smi alone in a single-engine purpose-built Ryan monoplane, "Spirit of St. Louis". This was the first solo transatlantic flight and the first non-stop flight between North America and mainland Europe. Lindbergh was an officer in the U.S. Army Air Corps Reserve, and he received the United States' highest military decoration, the Medal of Honor, for the feat.
Document 12: Charles Lindbergh: Charles Augustus Lindbergh (February 4, 1902 – August 26, 1974), nicknamed Slim, Lucky Lindy, and The Lone Eagle, was an American aviator, military officer, author, inventor, explorer, and environmental activist. At age 25 in 1927, he went from obscurity as a U.S. Air Mail pilot to instantaneous world fame by making his Orteig Prizewinning nonstop flight from Long Island, New York, to Paris. He covered the 33 ⁄ -hour, 3,600 smi alone in a single-engine purpose-built Ryan monoplane, "Spirit of St. Louis". This was the first solo transatlantic flight and the first non-stop flight between North America and mainland Europe. Lindbergh was an officer in the U.S. Army Air Corps Reserve, and he received the United States' highest military decoration, the Medal of Honor, for the feat.
Document 13: Bert Hinkler: Herbert John Louis Hinkler (8 December 1892 – 7 January 1933), better known as Bert Hinkler, was a pioneer Australian aviator (dubbed "Australian Lone Eagle") and inventor. He designed and built early aircraft before being the first person to fly solo from England to Australia, and the first person to fly solo across the Southern Atlantic Ocean. He married in 1932 at the age of 39, and died less than a year later after crashing into remote countryside near Florence, Italy during a solo flight record attempt.
Document 14: Dick Smith (entrepreneur): Richard Harold Smith, AC (born 18 March 1944) is an Australian entrepreneur, businessman, record-breaking aviator, philanthropist, and political activist. He is the founder of Dick Smith Electronics, Dick Smith Foods and Australian Geographic, and was selected as the 1986 Australian of the Year. In 2010 he founded the media production company Smith&Nasht with the intention of producing films about global issues. In 2015 he was awarded the Companion of the Order of Australia, and is a fellow of the Committee for Skeptical Inquiry.
Document 15: Transatlantic flight of Alcock and Brown: British aviators John Alcock and Arthur Brown made the first non-stop transatlantic flight in June 1919. They flew a modified First World War Vickers Vimy bomber from St. John's, Newfoundland, to Clifden, Connemara, County Galway, Ireland. The Secretary of State for Air, Winston Churchill, presented them with the "Daily Mail" prize for the first crossing of the Atlantic Ocean by aeroplane in "less than 72 consecutive hours". A small amount of mail was carried on the flight, making it the first transatlantic airmail flight. The two aviators were awarded the honour of Knight Commander of the Most Excellent Order of the British Empire (KBE) a week later by King George V at Windsor Castle.
ground_truth: Smithy