[D9235AAD], Telephone Message from Thomas Alva Edison to Eugene Howard Lewis, February 25th, 1892
https://edisondigital.rutgers.edu/document/D9235AAD
Transcription
Eugene Lewis Feby 25/92 Mr. Lehman has returned. The Cranberry mine is a large pocket of no great extent in depth but gives a great showing on top. The character of the ore is fibrous and exceedingly difficult to crush, it's also exceedingly difficult to separate, it contains lots of sulphur some if a form of scale impossible to get out. Altogether my opinion is that even with a good market its not a good speculation + would prefer some other fellow to do it. Edison