sided with Parliament in the English Civil War. During the Interregnum he was a leader of the Fifth Monarchists. In 1649 he signed the death warrant of Charles I and in 1660, shortly after the Restoration, he was found guilty of regicide and hanged, drawn and quartered. The son of Richard Harrison, the mayor of Newcastle-under-Lyme, he moved to London where he was admitted to the Inns of Court as an attorney at Clifford's Inn. Whilst a lawyer he met Charles Fleetwood and Edmund Ludlow. He enlisted in Earl of Essex's lifeguard in 1642 and experienced his baptism of fire at the Battle of Powick Bridge
