 He used his place in parliament to mount further attacks on Buckingham, and as one biographer has stated, he was "clearly moving in circles hostile to both arbitrary government and High Church innovations".He was in the House of Commons on 2 March 1629 when the Speaker, John Finch, would have obeyed King Charles I's direction for adjournment.Valentine, with Denzil Holles, held the Speaker down in his seat while Sir John Eliot read out resolutions questioning the king's proceedings respecting religion and taxation, particularly regarding tonnage and poundage.