John H. Boyle

1. Old Brick Capitol
   Dates unknown

Captain John Henry Boyle (died 1880) was an officer of the Confederate Army who found himself in conflict with the law on several occasions, being arrested or captured at least five times and eventually being named as a suspect in the assassination of Abraham Lincoln at the conclusion of the American Civil War. During the 1860 presidential election, Boyle had been accused of voter suppression in Prince George's and Charles counties, Maryland, alongside George Baden, William Berry, and James Judson Jarboe. On January 20, 1863, Boyle was captured in-uniform at his mother's house in Marlborough, Maryland, and spent five months in the Old Brick Capitol prison awaiting possible execution. On May 19, 1863, he was part of a prisoner exchange, and was soon after involved at the Battle of Gettysburg under Brig. Gen. George H. Steuart, who named Boyle in dispatches, "and Mr. John H. Boyle, volunteer aide–I am greatly indebted for valuable assistance rendered, and of whose gallant bearing I cannot too highly make mention."