One of the more colorful characters in Sackett history is Nathaniel Sackett who was one of George Washington's spymasters during the American Revolutionary War. Weygant's Sacketts of America includes much detail on Nathaniel, including the text of the letter from Washington appointing Nathaniel to the service of his country.
More material is now available on the Internet at the Library of Congress and at the
University of Virginia. Transcripts of a number of letters to and from Nathaniel have been added to The Sackett Family Association website. These give a fascinating insight into conditions during the war. The new material is included in a biographical sketch of Nathaniel which is included in the Notables section.
There is very likely more material to be had on this subject and others may wish to join in the hunt.