American inventor, developed vulcanization process used in the manufacture of rubber. His commitment to his endeavor was considered to be obsessive. Losing several fortunes his perseverance led him to success in developing the process, although he never received personal financial profit.

ADS, 1p., 6 1/2 x 2 3/8", Washington, D.C., May 12, 1860. A holograph check drawn on the Bank of Metropolis, payable to Chas. E. Langley for $5.00. Has normal cut cancellations, not affecting signature. Rare. Very Good. (#SI4103)