Fresh from his energetic Visitation of Cambridge, the Earl of Manchester was away, as we have seen, in May 1644, with his Lieutenant-general, Cromwell, to add the force of the Associated Eastern Counties to the forces of the Scots and Fairfax, then about to besiege the Marquis of Newcastle in York. The joint forces, numbering some 25,000 men in all, were hopefully conducting the siege when the approach of Prince Rupert out of Lancashire, with a Royalist army of over 20,000, compelled them to raise it, in order to oppose him (June 30). He avoided them, relieved York, and then, having added the Marquis's garrison to his own force, risked all for a great victory. The result was the BATTLE OF MARSTON MOOR, about seven miles to the west of York, fought on the evening of July 2, 1644. It was "the bloodiest battle of the whole war," the number actually slain on the field on both sides in three hours being no fewer than 4,150. But of these by far the most were on the King's side, and the battle was a disastrous rout for that side, and a victory for the Parliamentarians incalculably greater than any they had yet had. Rupert, with a shred of his army, escaped southwards; the Marquis of Newcastle, making his way to the sea-coast, embarked for the Continent, with his two sons, his brother Sir Charles Cavendish, General King, Lord Fauconberg, the Earl of Carnwath, Bishop Bramhall, and about eighty other Royalists of distinction, and was no more seen in England till the Restoration. York surrendered to the victors, July 5; and, save that Newcastle and some other towns remained to be taken, the whole North of England was lost to the King and brought within the sway of Parliament. Seldom had there been such consequences from a battle of three hours. [Footnote: Clar. Hist. 490-492; Parl. Hist. III. 277, 278; Carlyle's Cromwell, I. 151-154; Markham's Fairfax, 151-178, for a detailed modern account.]