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The Professor Dunham referred to is Kingsley Charles Dunham (1910-2001) who was the Professor of Geology at the University of Durham, 1950-1967 and Director of the Institute of Geological Sciences (now the British Geological Survey), 1967-1975.
Apollo 15 was launched on 26 July 1971, landed on the Moon on 30 July and splashed down back on Earth on 7 August. (Information from NASA mission pages). The report can be viewed here.
The British Geological Survey uses remote sensing techniques to study planetary geoscience. More can be read about that here.
Andrew L Morrison