Nathan hall, Benjamin, Tallmadge,Austin Roe,Abraham Woodhell,Anna Strong,Robert Townsent,James Armisted Lafeyette, Anne bates,

This is the list of spies engaged in direct esplonage. It includes Americas spying  against there own country and people spying on behalf of American revolution consisted of a complicated system of hidden network, interpersonal relation ships, scientific knowledge,personal cunning,guile and risk taking.

CIPHERS AND CODED LETTERS

Ciphers and secret codes were used to ensure that the contacts of a letter could not be understood if correspondence was captured. In cipher letters were used to represent and replace other letters to mask the true message of the missive.

INVISIBLE INK

One form of secret writing used by both the British and American armies was invisible ink. During the American Revolutionary war invisible ink usually consisted consisted of a mixture of ferrous sulfate and water.