This document is from envelope 203. It is an annulment of a December 17, 1877 agreement with Theodore Puskas, who promoted Edison's telephone and phonograph in Continental Europe during the 1870s and 1880s. The label on the envelope contains the following notation: "Release Theodore Puskas to Thomas A Edison May 14, 1879 release in connection with speaking telephone."

Courtesy of Thomas Edison National Historical Park.