2 entries match your criteria. Related Historical MarkersThe Manly Portable Convict Cage Marker detail: Manley Portable Convict Car SHOWN IN SOURCE-SPECIFIED ORDER1► Florida (St. Johns County), St. Augustine — Jail on Wheels — On San Marco Avenue (Florida Highway A1A) (Business U.S. 1) north of Missouri Avenue, on the right when traveling north. 2► South Carolina (Pickens County), Pickens — Manly Portable Convict Cage — On Johnson Street.