[D9241ACH], Letter from Thomas Alva Edison to Alfred Ord Tate, October 17th, 1892
https://edisondigital.rutgers.edu/document/D9241ACH
Transcription
Orange N.J. Oct 17/92 Tate Please get me some statistics on phono that will help Seligman in London, be sure they are correct + specially get addressed of all commercial houses who have phono + who if written to would be sure to give good answer. Make it full as possible wanted quickly. Edison