From the Richmond Examiner, 1/24/1866, p. 3, c. 3
ANOTHER CASTLE THUNDER DELIVERY. – A scientific piece of tunneling delivered four more negroes from confinement in Castle Thunder on Monday night. They dug out the rear wall, through brick and masonry, and got off clear without being seen by the guard. One of the liberated negroes is Alexander Hamilton, a notorious Dick Turpin, with a black skin, who was confined upon the double charge of robbing Mr. Ellett of his silverware and Mr. Isaacs of a trunk, containing clothing and valuables. All the escaping negroes had a ball and chain to their ankles, and must have been concealed, or assisted away by outside negroes.