George Stanfield Blake (1876–1940) was a British mineral and mining geologist, fluent in French, Italian, German and latterly his family understood Palestinian Arabic/Levantine Arabic, which aided his later survey work. Early career (1900–1922) On completing his degree at age 21, he worked as an assayer in London and at the Royal Mines of Elba. During the period of 1900/1901 to 1909 he was on staff at the Scientific and Technical Department of the Imperial Institute engaged in mineralogical studies of Crown colonies. Here, with Dunstan, thorianite from Ceylon was described as a new mineral and he published papers on baddeleyite and zirkelite from Ceylon and carnotite from South Australia. After this, he spent time in Matto Grosso, Brazil exploring for minerals, looking for gold at Timmins around Porcupine Lake, Ontario, and prospecting for petroleum in Newfoundland and Canada. On returning to England in 1915, he worked at Warrington as a mineral analyst and then at Sheffield as deputy chief analyst, both roles for the Ministry of Munitions. Between 1920 and 1922 he worked as a tutor at the Imperial College of Science and Technology. Palestine From 1922 to 1939, Blake was employed as Geological Advisor to the Mandatory Government of Palestine, where the most basic exploratory challenges existed and his analytical interpretive work from mineralogical and mining knowledge led him to complete the geological corner stones for Palestine and Transjordan. Having grappled with the absence of mapping, he built on former work and published the first Water Resources Survey of Palestine in 1928. Later he worked with the Potash Company (Novomeyski), on sulphur mining near Gaza, bituminous shales, phosphate, iron (Ajlun) and Roman exploited copper deposits at Fenan (Wadi Feynan) that enabled him to develop his 1930 paper. This ultimately completed his stratigraphic interpretation of depositional environments and structural changes/events, which can be found in the geological maps and reports from 1937 and 1939. Blake's 1939 report formed a major part of M.G. Ionides' book, Report on the Water Resources of Transjordan and Their Development. Chapter IV on Geology, Soils and Minerals was taken from Blake's unpublished report in its original form and Chapter V on The River System of the Jordan and Dead Sea Basin is largely Blake's text just rearranged to suit the study and with additional hydrographs. Blake's last writings were incorporated, like the Ionides report, in Goldschmidt's account on water resources, and were published posthumously after