[LB040208], Letter from Thomas Alva Edison to Thomas Commerford Martin, April 25th, 1890
https://edisondigital.rutgers.edu/document/LB040208
Transcription
April 25, 90 My dear Mr. Martin,- I have your letter of 22nd instant, and regret that I cannot express an opinion upon the subject which you mention. I have now been so long out of the telegraph business that I feel I am not competent to pass judgement upon questions connected therewith. Yours very truly, Thos A. Edison T.C. Martin, Esq., The Electrical Engineer, #150 Broadway, New York