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Creator is exactly Cromelin, R F
[D9059AAE], Letter from R F Cromelin, Columbia Phonograph Co to James Ogilvie Clephane, June 30th, 18901890-06-30
[D9152AAO], Letter from Columbia Phonograph Co, R F Cromelin to Edison General Electric Co, Samuel Insull, September 25th, 18911891-09-25
[D9436AAD1], Letter from Columbia Phonograph Co, R F Cromelin to United States Phonograph Co (Newark), October 20th, 18941894-10-20