after an indecisive engagement near Newbury, in which Lord Falkland fell, "ingeminating 'Peace, peace!'" and the London train-bands flung Rupert's horsemen roughly off their front of pikes. [Sidenote: League with Scotland.] The relief of Gloucester proved to be the turning-point of the war. It was not merely that Charles had met with a repulse; it was that he had missed a victory, and that in the actual posture of affairs nothing but a great victory could have saved the king. For the day which witnessed the triumphant return of Essex witnessed the solemn taking of the Covenant. Pym had resolved at last to fling the Scotch sword into the wavering balance; and in the darkest hour of the Parliament's cause Sir Harry Vane had been despatched to Edinburgh to arrange the terms on which the aid of Scotland would be given. First amongst these terms stood the demand of a "unity in Religion"; an adoption, in other words, of the Presbyterian system by the Church of England. To such a change Pym had been steadily opposed. He had even withstood Hampden when, after the passing of the bill for the expulsion of bishops from the House of Peers, Hampden had pressed for the abolition of episcopacy. But events had moved so rapidly since the earlier debates on Church government that some arrangement of this kind had become a necessity. The bishops to a man, and the bulk of the clergy whose bent was purely episcopal, had joined the royal cause, and were being expelled from their livings as "delinquents." Some new system of Church government was imperatively called for by the religious necessities of the country; and though Pym and the leading statesmen were still in opinion moderate Episcopalians, the growing force of Presbyterianism, and still more the absolute need of Scottish aid and the needs of the war, forced them to seek such a system in the adoption of the Scotch discipline. [Sidenote: England swears to the Covenant.]