In the novel, Clayton Harris was confined at Johnson's Island, Ohio, located here.
p. 317 On July 20, 1863, the door to Clayton Harris’ cell block…Union Colonel Charles Harris
p. 322 On July 22, 1863, Clayton Harris was ferried from Johnson’s Island across Sandusky Bay to the mainland. He stepped onto the rich Ohio soil and breathed deep. Even the air smelled free.
[Pictures Taken By Jim & Cathy During A Visit To Johnson's Island- click to enlarge]