Url https://edisondigital.rutgers.edu/document/D7903ZDY Resource class dctype:Text Title [D7903ZDY], Letter from William Halsey Ingersoll to Thomas Alva Edison, May 21st, 1879 Creator Ingersoll, William Halsey Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1879-05-21 Type Letter Identifier D7903ZDY Source 49:234 Rights Thomas Edison National Historical Park Date Created 1879-05-21 Has Version https://archive.org/details/edisonmicrofilm49/page/n242/mode/1up Archive.org Viewer, Microfilm Series Reel 49 Is Part Of D7903-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/D7903ZDY https://edisondigital.rutgers.edu/document/D7903ZDY --