But a heavier blow still was struck by Glendower, and the feeling at Ludlow was nothing short of consternation, when a fugitive arrived from the town of New Radnor, saying that the strong castle there had been carried by assault, the garrison of three-score men all beheaded, and the town laid in ashes. This was the heaviest blow yet struck by Glendower. The castle was of great strength, and the town had been walled by the Lords of the Marches. That such a place should have been carried by Welsh kerns seemed well-nigh incredible, and the execution of the whole of the garrison aroused the most lively indignation. "This is war to the knife, indeed," Sir Edmund Mortimer said; "and yet, abhorrent as is this wholesale murder of the garrison, I cannot but own that it is a politic step, on the part of Glendower. The news will spread throughout Wales, and if so strong a place as New Radnor could not defend itself, how can lesser castles hope to do so? Nor, indeed, will garrisons care to man the walls, since resistance means death. Doubtless there were many Welsh among these men who were murdered, and you may be sure that their compatriots, in other castles, will hasten to desert and join Glendower." This, indeed, proved to be the case, the garrisons of the castles dwindled away, and hold after hold fell without resistance. Even in Ludlow, every precaution was taken; all Welshmen were expelled from the town, and the garrison was also purged of them, although some of the men-at-arms had served for many years. These men were told that, after the troubles were over, they should again be taken into the service if they chose; but that, in the present state of things, one traitor might endanger the safety of the castle and town; and that, as it was impossible to tell who were true men and who had been corrupted by Glendower's agents, it was necessary that all should suffer, even if innocent. Among the tenants of Mortimer's estate, and those of the young earl, were many Welsh. Against them no measures were taken. They and their fathers, sometimes indeed three generations of them, had lived peaceably; and had rendered military service, when required, in the troubles of England; and Mortimer was reluctant to treat them harshly, especially as all declared their readiness to serve, and prove their devotion to their English lord. "They are not sufficiently numerous," he said, "to be a source of any danger. Were Glendower to invade England in great force doubtless they would join him, to save their lives and those of their families; but being but one to four or five of the English tenants, I see not that they can be a source of danger to us." Chapter 16: A Letter For The King.