Lithograph bound into notebook: 'Key No.1 of the Universal Telegraphs adapted to the Principle of Rear Admiral Sir Home Popham's Telegraphic Vocabulary', Lt-Col Sir Charles Pasley, 1823
Lithograph bound into notebook: 'Key No.1 of the Universal Telegraphs adapted to the Principle of Rear Admiral Sir Home Popham's Telegraphic Vocabulary', Lt-Col Sir Charles Pasley, 1823