[1][2] A cavalier during the English Civil War, he was knighted by Charles II, participated in the Battle of Worcester, and was imprisoned in the Tower of London for over a decade.
He escaped with other prisoners, but was retaken and committed to the Tower of London under an order of the Council of State, dated 1 November 1651 "for invading this nation with Charles Stuart."
On 5 February 1655–6, Jackson once again petitioned Cromwell for release on security for good conduct, alleging that otherwise he must perish for want, as his friends could no longer supply him.
The certificate of the Lieutenant of the Tower accompanying the petition states that "he has demeaned himself civilly, is retired and studious and very poor and fit to be released."
His burial registry reads as such "Sir Anthony Jackson, of the Inner Temple, kt, was buried in the round near the iron gratt the 14th day of October, 1666.