Phelps, R. H. (1876). Newgate of Connecticut: Its origins and early history. Being a full description of the famous and wonderful Simsbury mines and caverns, and the prison built over them. To which is added all the incidents, insurrections, and massacres, connected with their use as a prison for the Tories during the revolution. Also. An illustrated description of the state prison at Wethersfield. Hartford, CT: American Pub. Co..

Phelps, Richard Harvey. Newgate of Connecticut: Its Origins and Early History. Being a Full Description of the Famous and Wonderful Simsbury Mines and Caverns, and the Prison Built Over Them. To Which Is Added All the Incidents, Insurrections, and Massacres, Connected With Their Use As a Prison for the Tories During the Revolution. Also. An Illustrated Description of the State Prison At Wethersfield. Hartford, CT: American Pub. Co., 1876.

Phelps, Richard Harvey. Newgate of Connecticut: Its Origins and Early History. Being a Full Description of the Famous and Wonderful Simsbury Mines and Caverns, and the Prison Built Over Them. To Which Is Added All the Incidents, Insurrections, and Massacres, Connected With Their Use As a Prison for the Tories During the Revolution. Also. An Illustrated Description of the State Prison At Wethersfield. Hartford, CT: American Pub. Co., 1876.