Powder horns carried extra gunpowder for the flintlock muskets then in use by the Massachusetts Militia. This powder horn belonged to Zachariah Tarbell Sr. (1730-?) or his son Zachariah Tarbell Jr. (1754-?) of Westminster, Massachusetts. their unit, Capt. Wood’s Company of Col. Sargent’s Regiment, turned out on April 19, 1775 in response to the alarm at Lexington and Concord. They were too far away to arrive in time for any of the fighting in Concord, but Private Tarbell and his comrades continued to join the Siege of Boston. Tarbell Sr. got sick during the siege, but survived, and he and his son both returned home later in 1775.
Source: U.S. Department of the Interior, National Park Service