Illustration.
From the title page verso of Anglo-American Telegraphic Code to Cheapen Telegraphy and to Furnish a Complete Cypher (1891). Original from Harvard University. Digitized July 22, 2008.
Illustration.
From the title page verso of Anglo-American Telegraphic Code to Cheapen Telegraphy and to Furnish a Complete Cypher (1891). Original from Harvard University. Digitized July 22, 2008.
