Jacob Eyster, the son of Revolutionary War veteran George and Margaret Slagle Eyster, born near Hanover, Adams County, PA., June 8, 1782, enrolled in the Adams County Militia, was appointed first sergeant, rose to captain, and then major. In 1814, he was appointed by Governor Snyder brigadier-general Second Brigade, Fifth Division, Pennsylvania militia. During the invasion of Maryland by the British that year he was employed by the Secretary of War (Armstrong) and the Governor of Pennsylvania in distributing and forwarding arms and supplies to the militia who were called into service. In 1811, he moved to Gettysburg and engaged in business; was an unsuccessful candidate (1818) for the state House of Representatives, elected to the state Senate in 1822; moved to Harrisburg and in 1824, resigned his seat in the Senate, assuming the duties of state deputy surveyor-general, serving the office for fifteen years. Jacob later worked as cashier of a bank in Hagerstown, MD., but after a year’s absence returned to Harrisburg where he passed the remainder of his life. He died there on March 24, 1858. He married Mary Middlecoff (1810) of Adams County, who died at Harrisburg, March 24, 1867, at the age of seventy-five years.