Secret Apparatus

‘The Secret apparatus for tampering with, copying & forging letters in the interests of the State’...
A5 pamphlet

The 1666 ‘Great Fire of London’ in 1666 destroyed 13,200 houses, 87 parish churches, St Paul’s Cathedral and most of the administrative buildings of the City authorities.
It also devastated some of the most secret offices of the English state… and destroyed a mysterious machine designed for surveillance of subversive elements: the
‘Secret apparatus for tampering with, copying & forging letters in the interests of the State’... devised by Sir Samuel Morland, inventor, diplomat and spy...