Guarding the mails; or, The secret service of th Post-office department. Being a record of mail robberies and their detection. Embracing sketches of wonderful exploits of special agents in the detection, pursuit and capture of depredators upon the mails, with a complete description of the many means and complicated contrivances of the wily and unscrupulous to defraud the public
Woodward, P. H. (Patrick Henry), 1833-1917