|  | Sir 
Joseph  Wilson Swan | |
|  | Documents | |
| Letter of  Edison to
Hannah Swan      
18 June 1888 (velina) | ||
| Documents Swan | ||
|  | ||
| 06/18/1888
Edison, Thomas Alva to Swan,
Hannah (Mrs Joseph
W.) (Edison Phonograph Works; Gouraud, George Edward; Swan, Joseph Wilson) Edison travel; Cylinder phonograph [X088D] American Philosophical Society Library, Philadelphia, Pa.: Miscellaneous Manuscripts Collection [X088DF; TAEM 622:405] Courtesy of American Philosophical Society. | ||