[LB059296], Letter from Thomas Alva Edison to Franz Wittman, January 14th, 1897
https://edisondigital.rutgers.edu/document/LB059296
Transcription
Jan 14th 1897 Prof Franz Wittman Köngl. Josefs Polytechnikum Budapest Dear Sir:- Mr Francis Jehl was with me a number of years as Assistant and I always found him a great worker and very concientious in performing his duties. I would trust him with any Electrical Works of small size Yours very truly Thomas A. Edison