Rare Polygraph by I. H
Farthing of Cornhill London to the patent design of Marc Isambard Brunel
(1769-1849)
The box is in the Campaign style, made of solid mahogany using dovetail
joints reinforced with brass corners, straps and edges. The box has
countersunk brass handles. There is a drawer designed to hold the
Polygraph mechanism when not in use. There are seven secret drawers
concealed behind three sprung panels. The box retains its original
inkwells. The Polygraph mechanism which enabled
the movements of one pen to be copied by another is now missing.