Before this was set up, London had but three gates: Aldgate,
Aldersgate, and Ludgate. The new one was added in the reign of Henry I.
Nash, in his Pierce Penilesse.
says that Newgate is “a
common name for all prisons, as homo
is a common name for a man
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894