All pictures Copyright
 E & BJ Capper Nagold 2017

 

Dartmoor Prison, Princetown, Devon, UK

Here it is in Google Maps.

English prison, at Princetown, Devonshire, built (1806–9) to house French captives during the Napoleonic Wars. During the War of 1812 many American prisoners were confined there, and their brutal mistreatment was investigated after the war by an Anglo-American commission that awarded compensation to the families of those who had died there..... Unoccupied for over 30 years, Dartmoor was reopened in 1850 as a civilian prison for convicts sentenced to long terms of imprisonment or to hard labor. (From the Columbia Encyclopedia: Sixth Edition. 2000.)
 

John Capper profession at son Williams birth on 12th Feb. 1873 is Civil Guard Dartmoor Convict Prison.

In his obituary, it is mentioned that he had served under Goverment  for 45 years - in the Army, War Department and Customs. The time as a Civil Guard at Dartmoor was presumably for the War Department.

 

Links:

History of Dartmoor Prison - on the official Dartmoor Prison site

Wikipedia article

 

My cousin Tim Pratt received the following answer to his letter asking for information about John Capper at Dartmoor: