Petition of Right
Instead of taxes, he imposed a forced loan and over 70 individuals were jailed for refusing to pay, including Hampden's cousin, Sir Edmund Hampden. When Hampden also declined to subscribe, he was arrested; while in prison, he met Sir John Eliot, who led the Petition of Right campaign in 1628. The consequent reduction of income from the loans obliged Charles to call a new Parliament in March 1627. This returned "a preponderance of MPs opposed to the King", including Selden, Coke, John Pym and a young Oliver Cromwell.