The defeat was a serious blow to the Parliament's cause in Yorkshire, and its moral effect was greater still. Moreover the Lancashire troops at once returned home, with the exception of 200 foot and 20 horse, who were persuaded to remain on promise of prompt pay. The Fairfaxes were unable to retain Bradford, and were forced to retreat to Hull, which was soon practically the only place in Yorkshire in the hands of the Parliament. It was indeed only by good fortune that they kept Hull, for Sir John Hotham had declared that he would shut the gates against them; but the discovery of the Hothams' plot and their arrest gave Fairfax a place of retreat when he most needed it. On July 5th, Newcastle dated from Bradford a summons to the town of Manchester. He offered the townsmen protection and pardon if they would lay down their arms. But it was not likely that having already driven the royalists out of their own borders the Manchester garrison would listen to a summons sent from 30 miles distant; and a defiant answer was returned two days later. "Sir we are nothing dismayed at your force, but hope that God who hath been our Protector hitherto, will so direct our just Army that we shall be able to return the violence intended into their bosoms that shall essay the prosecution of it." This is, however, very different language from the urgent letter to Lenthall written the day before,[113] in which they refer to their loss of men and arms at the battle of Adwalton Moor, the encouragement which that defeat had given to the royalists at home, and the great danger in which they were placed by the retreat of Fairfax to the extreme east of Yorkshire. Newcastle, however, soon had too much on his hands in Yorkshire to do more than send a summons into a neighbouring county. But the Lancashire leaders took the precaution of guarding the frontier against him. They sent 1200 men to Rochdale, and 800 more to Blackstone Edge, four miles further on, over which passes the main road into Yorkshire. The garrison was attacked once at least; and it was kept there most of the winter, being maintained out of the several Hundreds of the county from sequestered Roman Catholic estates. Colonel Tyldesley's estate at Myerscough was one of the first to be sequestered (Oct.). The defences at Blackstone Edge were constructed under the direction of Rosworm, who was sent from Manchester for that purpose. The newspapers report that in the middle of July Newcastle sent 200 horse to break through, but without success. A few were killed and many taken prisoners, and the rest retreated; "because it is naturally so strong that 500 men can keep 1000 neither is that way fit either for carriages or ordnance." Indeed the nature of the ground, which is very rough and covered with heather, is such as to make it exceedingly difficult for the movements of cavalry.[114]