ALBANY, N.Y. — A rarely displayed lock of American traitor Benedict Arnold’s hair will be exhibited at the New York fort he helped capture with the help of Vermont’s Green Mountain Boys in the Revolutionary War’s opening weeks.

Officials at Fort Ticonderoga announced Wednesday that locks of hair from Arnold and his first wife Margaret will be displayed this weekend when the privately owned upstate historic site and tourist attraction opens for the season.

Curator Matthew Keagle said the hair was recently rediscovered among the museum’s vast collection of 18th century military artifacts, ranging from muskets and artillery to uniforms and documents.

“There so much in the museum collection that’s not on display. It’s still an ongoing cataloguing process,” Keagle told The Associated Press. “Sometimes we rediscover things, and this was one of them.”

Keagle said the hair was preserved by the couple’s youngest son Henry, who was living in Canada when someone sent him the keepsake after his father died destitute and forgotten in London in 1801. Margaret Arnold died in 1775 in Connecticut, Benedict Arnold’s home state. Benedict’s lock of hair was wrapped in paper inscribed: “Two locks of my Father’s Hair sent from London, 1801. Henry Arnold.”

Saving a lock of a deceased loved-one’s hair was a common practice during the era, a method of preserving “a physical reminder of the presence of that person,” Keagle said.

The locks of hair were acquired by Fort Ticonderoga from one of Arnold’s direct descendants in 1952, the curator said.

Arnold was an officer in the Connecticut militia when he and a small force of frontiersmen led by Ethan Allen rowed across the southern end of Lake Champlain on the night of May 10, 1775, and captured the British-held fort, located 90 miles (145 kilometers) north of Albany.