| Charles Robinson, Springfield, Photographicon 1865 Book page Google Books LL/97763 1865, The Tenth Exhibition of the Massachusetts - Charitable Mechanic Association, at Faneuil and Quincy Halls, in the City of Boston, September, 1865. , (Boston: Printed by Wright & Potter), vol. 10-11, pp. 82-83
US Patent no: 50,498, "Apparatus for Preserving and Exhibiting Photographic Pictures.", Oct 17, 1865
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