Ashbel Woodward

Guarding the Mails or the Secret Service of the Post Office Department (1882)

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,

The Secret Service of the Post-Office Department, as Exhibited in the Wonderful Exploits of Special Agents or Inspectors in the Detection, Pursuit, and Capture of Depredators Upon the Mails

Statue of Colonel Thomas Knowlton: Ceremonies at the Unveiling (1895)

The Secret Service of the Post Office Department (1886)