George James Lee resided in Kimberley from the beginning of diamond mining there . He made the mineralogy of the mine his special study and sent fossils from there to the British Museum. He was well-acquainted with Dr J.W. Matthews and provided most of the information and illustrations for two chapters in the latter's book (Matthews, 1887). The first of these contained a detailed description of the geology of Kimberley mine and its surroundings, while the second discussed theories of the origin of the diamondiferous deposits.
In 1880 G.G. Lee, presumably the same person, collected a fossil plant of the Glossoptera flora in the white shale of the Ecca Group in Kimberley mine and sent it to the Palaeontology Department of the British Museum (Natural History). No description of the specimen was published. (Anderson & Anderson, 1985).
George James Lee provided meteorological observations, made at Kimberley during 1887 and 1888 only, to the Cape of Good Hope Meteorological Commission, including atmospheric pressure, wet and dry bulb temperatures, minimum and maximum temperatures, and rainfall. At that time another meteorological station in the town was manned by Charles Aburrow*.