On the night of his arrival at Derby Charles discussed at length the question of the dress which he should wear on his entry into London; but on the following day his officers represented to him the danger of further advance, with Wade and Cumberland closing in upon his rear. News had arrived of the landing of French troops at Montrose; it would be better, they urged, to retreat while there was yet time and to join them. Charles combated the proposition hotly for the whole day, but yielded at last; and on the morrow the retreat was begun. Cumberland, who had fallen back to Coventry, at once caught up four thousand men and followed the rebels by forced marches, but did not overtake them until the 18th, when his advanced parties made an attack on Murray's rear-guard at Clifton Moor, a few miles to the south of Penrith. The English, however, were repulsed with the loss of a hundred men, a misadventure easily explained by the fact that the action was fought after dark, when the musket was a poor match for the claymore. Still the repulse was not creditable to the royal troops nor encouraging for further attempts upon the rebel rear-guard. Wade meanwhile made no attempt to intercept the northward march of Charles, who crossed the Esk into Scotland unmolested on the 20th of December, and six days later occupied Glasgow. His force, despite many days of halt, had covered the distance from Edinburgh to Derby and from Derby back to Glasgow in exactly eight weeks. A few days later he resumed his march to Stirling, where he was joined by the French, who had landed at Montrose, and by other levies which, notwithstanding General Handasyde's entreaties that they might be attacked from Edinburgh and Inverness, had been allowed to assemble in the north. These reinforcements augmented his strength to nine thousand men: and since the French had brought with them battering guns Charles resolved to besiege the Castle of Stirling and so to secure for himself, if possible, all Scotland north of the Firths of Forth and Clyde.