And now commenced the difficulties of that undertaking in which Lord George had pledged himself to conduct an army of little more than six thousand men, in the depth of winter, in safety to Scotland, although in the neighbourhood of two great armies. The management of this retreat has been a subject of admiration to all competent judges of military affairs; it has conferred lasting honour on the capacity of Lord George Murray as a General. It was of the greatest importance, under his circumstances, that Lord George should know of the movements and intentions of the enemy; and such was his system, such his address, in employing spies and emissaries, that he was always informed of what took place in the armies of the Duke and General Wade. One of his principal agents was Hewett, a butcher in Derby; who, from his local knowledge, could tell many particulars of the country-gentlemen, as well as of the movements of the Duke and his formidable forces.[146] The Highland army arrived on the night of the sixth at Ashbourn, on the following day they reached Leek, on the ninth they arrived at Manchester, where a great revulsion of feeling had taken place. The "Hanoverian mob," to use the expression of Mr. Maxwell, were determined to dispute the Prince's entrance; but when his vanguard appeared, these noisy heroes were instantly silenced.[147] From Manchester the Prince proceeded to Wigan, and thence to Preston, where he halted on the twelfth. Here the disappointed young man recurred to his cherished project, that of having reinforcements sent from Scotland, under Viscount Strathallan, who had been left in command at Perth, and those also under Lord John Drummond. Upon his arrival at Preston, he sent the Duke of Perth into Scotland to bring them with the utmost expedition. He was resolved to retire no further until he met them, and then to march directly for London, casting his whole chance of success upon the event of that step. Among the generals and chiefs of this army a different sentiment had now arisen. A safe retreat was their object, and the subject of universal attention. Hitherto there had been little or no danger; it was impossible for the enemy to overtake the army before it had reached Preston; but between Preston and Carlisle it was practicable for the enemy's cavalry to come up with the Prince's army during that march. There was even a greater danger to be apprehended than the pursuit of the Duke. Marshal Wade had left his position at Newcastle-upon-Tyne, having been ordered by the Duke to place himself between the insurgent forces and Scotland, in order to cut off the retreat. There were in those days but few roads, or even passes in the mountainous regions of Cumberland and Westmoreland, by which a regular army could march. There was, however, an excellent road from Newcastle to Penrith, a town through which Wade might march his army, and where he could arrive a day or two before the Prince, and intercept his retreat.