Final answer:
Mr. Lockton was the person who revealed the plot to assassinate General George Washington to his/her fellow conspirators.
Step-by-step explanation:
The person who revealed the plot to assassinate General George Washington to his/her fellow conspirators was Mr. Lockton. In the book 'Chains' by Laurie Halse Anderson, Mr. Lockton is portrayed as a Loyalist who had infiltrated the Patriot household. He discovers the plan to kill Washington and informs his fellow Loyalists instead of warning Washington. This revelation has significant consequences for the main characters, Isabel and Curzon.
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