Secret diplomacy
Subtitle: espionage and cryptography, 1500-1815
By: James Westfall Thompson and Saul K. Padover.
Contributors: Padover, Saul K.
Edition: [New ed.]
Publisher: Frederick Ungar
Published: 1963
Place of publication: New York
Language: eng
Number of pages: 290
Subjects: Diplomacy -- History.; Secret service.; Cryptography -- History.; Europe -- Politics and government.
Notes: "Appendix, Cryptography", p. 253-263.

Originally published 1937.

Bibliography, p. 265-282.