[D9248AAQ], Letter from Thomas Alva Edison to Lamson (John S.) and Bro, 1892
https://edisondigital.rutgers.edu/document/D9248AAQ
Transcription
Letterhead of the Laboratory of Thomas A. Edison. Cable Address “Edison, New York.” John S Lamson Please send a 10 lb sample of your very best lump Syrian asphalt and grate price for 1000 lbs as per sample we want the very best & purest TA Edison