[1] His first voyage in Arctic waters was on a whaling cruise in 1886–1887, and in 1893 he made a sledge-journey of 3000 miles across the frozen tundra of Siberia lying between the Ob and the Pechora.
[2] Sponsored by the Royal Geographical Society, this expedition was to conduct general exploration of Franz Josef Land.
Whilst leading this expedition, Jackson and his men met by chance on 17 June 1896 the Norwegian arctic explorer Fridtjof Nansen and his companion Hjalmar Johansen, who had not been heard of for three years and were presumed dead, but were in fact trying to reach Spitsbergen by kayak.
In recognition of his services he received a knighthood of the first class of the Norwegian Royal Order of St Olaf in 1898, and was awarded the gold medal of the Paris Geographical Society in 1899.
[8] He transferred to the 4th Battalion, East Surrey Regiment in 1905, serving in the First World War and reaching the rank of Major.