In 1930, Wager made his first trip to eastern Greenland with the British Arctic air route expedition led by Gino Watkins. Early in the expedition, Wager identified and named the Skaergaard intrusion at the mouth of the Kangerdlugssuaq Fjord and immediately realised its significance, a realisation which has been called "a stroke of genius". The expedition also proved his mettle as an explorer; at one point the relief of a station required him to undertake a 125-mile sledge journey to the highest point on the ice-cap in atrocious conditions – an endeavour which took 39 days. Wager also made an attempt to climb Mount Forel in Schweizerland, at the time the highest known peak in the Arctic at 11,500 ft. The party turned back 500 ft below the summit, but had still made the highest climb in the Arctic to date. The research carried out in Greenland would form the basis of Wager's subsequent career, and he made a further three visits there in the 1930s, playing an increased role in leading and organising the expeditions. The aim was to map the Skaergaard Intrusion in detail, and as much of the surrounding area as possible. A total of 35,000 km2 of difficult terrain was mapped, and the results of his explorations were published in four volumes of Meddelelser om Grønland. The work on the Skaergaard Intrusion has been described as possibly "the most significant single contribution yet made to the science of petrology".
Everest
In 1933 Hugh Ruttledge led a British expedition to the north side of Mount Everest, the first since the 1924 expedition on which Mallory and Irvine had disappeared. The team assembled included Percy Wyn-Harris, who had known Wager at Cambridge, and when Noel Odell was forced to drop out for business reasons, Wager was selected as a late replacement. On 30 May, Wager and Wyn-Harris made the team's first attempt on the summit. They followed the traverse route below the mountain's northeast ridge, as pioneered by Norton in 1924, rather than the ridge itself. They reached approximately the height Norton had gained before turning back due to poor snow conditions and the lateness of the hour. In doing so, they equalled the highest point reached in mountaineering at the time, and set an altitude record for climbing without supplemental oxygen which would not be bettered until Messner and Habeler reached the summit of Everest in 1978. He also participated in the unsuccessful 1936 expedition.
Wartime service and post-war career
During the Second World War, Wager worked for the Royal Air Force in the photographic interpretation section. He was commissioned as a pilot officer on 12 August 1940, and promoted to flying officer a year later. In 1942 he braved the notorious Murmansk Run as part of a small reconnaissance team attempting to track down the German battleship Tirpitz. Wager was Mentioned in Despatches for his work. He was promoted to temporary flight lieutenant on 1 September 1942, and the rank was made substantive on 11 February 1943. He resigned his commission on 1 July 1944. In 1944 Wager was appointed to the chair of geology at the University of Durham, and after being elected a Fellow of the Royal Society two years later, moved to the University of Oxford in 1950 as Professor of Geology. There he helped to modernise what had been a failing department. He made a further expedition to Greenland in 1953, but in 1955 a heart attack put an end to his career as an active mountaineer and explorer. His academic work was unaffected however, and he became active in the fields of geological age determination and isotope geochemistry. He was also a key driving force in the founding of two geological journals - Geochimica et Cosmochimica Acta in 1950 and Journal of Petrology in 1960. In 1965 he died suddenly as a result of a second heart attack. His book Layered Igneous Rocks, written with his protégé Malcolm Brown, was published posthumously in 1968, and became a standard text. The International Association of Volcanology and Chemistry of the Earth's Interior awards the Wager Medal in his honour. He had married Phyllis Worthington, who accompanied him to East Greenland on the 1935-1936 expedition becoming, with her sister-in-law, the first British women to spend a winter there.
