On January 19, 1644, the Scottish army, under the Earl of Leven, crossed the Tweed. Newcastle was pushed back into York, where he was besieged by the combined forces of Leven and the Fairfaxes. On May 6 Lincoln, which had been regained by the Royalists, was retaken by Manchester, who together with Cromwell pushed on to join in the siege of York. Rupert, however, having been sent northward by Charles, succeeded in raising the siege; and on July 2 a battle was fought on Marston Moor, in which the Royalist army, successful at first, was utterly crushed by Cromwell's skill. Having routed Rupert's horse, he drew bridle and hurried back to the assistance of the Scottish infantry, which was holding its own against overwhelming numbers of the enemy. The King's regiments of foot were routed or destroyed by his impetuous charge. Cromwell had redeemed the day after the three generals, Leven, Manchester and the elder Fairfax, had fled from that which they deemed to be a complete disaster. Before long the whole of the North of England, save a few outlying fortresses, was lost to the King. In the South, matters were going badly for Parliament. Waller's army, checked at Cropredy Bridge, melted away by desertion; whilst Essex, attempting an inroad into Cornwall, was followed by the King. Essex himself and his cavalry succeeded in making their escape, but on September 2 the whole of his infantry surrendered to Charles at Lostwithiel. Unless Manchester came to the rescue, it would be impossible to avert disaster. Manchester, however, was hard to move. Between him and his Lieutenant-General there was no longer that good understanding which was essential to successful action. Manchester, longing for peace on the basis of a Presbyterian settlement of the Church, could not be brought to understand that, whether such an ending to the war were desirable or not, it could never be obtained from Charles. Cromwell, on the other hand, aimed at religious toleration for the sects, and that security which, as his practical nature taught him, was only attainable by the destruction of the military defences in which Charles trusted. That those defences were the ramparts of the city of destruction, he never doubted for an instant. Writing in his most serious mood immediately after the victory of Marston Moor, to the father of a youth who had there met his death-wound, his own losses rose before his mind. Of his four sons, two had already passed away:--Robert, leaving behind him a memory of unusual piety, had died in his schoolboy days; whilst Oliver, who had charged and fled at Edgehill had lately succumbed to small-pox in the garrison at Newport Pagnell. Yet it was not only to the example of his own sorrow that Cromwell mainly looked as a balm for a father's bereavement. "Sir," he wrote, "you know my own trials this way, but the Lord supported me with this that the Lord took him into the happiness we all pant for and live for.