Despite modern-day pop culture references, there is no evidence to suggest that General Gage’s wife, Margaret Kemble Gage, was a spy for the Sons of Liberty

How Joseph Warren and the Sons of Liberty were able to compile such top-secret information on the British soldiers in Boston is one of the mysteries surrounding the events in Boston in the spring of 1775. In New England, people like Warren, John Hancock, Sam Adams, Paul Revere, and others honed the technique of acquiring information and disseminating it throughout their network. There are signs that Warren and his colleagues were aware of the intentions before many British soldiers, even though General Thomas Gage's plans for April 19, 1775, were only disclosed to a small number of persons in his inner circle.

Margaret Kemble Gage, Gage's wife, was one of the several sources for this knowledge that were suggested. Margaret, who was born into a prosperous family in New Jersey, wed Gage in 1758. Her writings frequently display her conflicted loyalties, which are common for many people. Her association with a colonial spy program has only ever been suggested and not verified. She traveled to England shortly after the fighting in April, and many have inferred that this indicates Gage disapproved of his wife's alleged participation in Warren's spy network.

Margaret Gage is portrayed as Joseph Warren's romantic interest in some pop culture references. Despite being a good story, there is no evidence that Mrs. Gage was the source of information for the Patriots in Boston.