now morgoth , who knew much of what was done and designed by his enemies , chose his hour , and trusting in his treacherous servants to hold back maedhros and prevent the union of his foes he sent a force seeming great ( and yet but part of all that he had made ready ) towards hithlum ; and they were clad all in dun raiment and showed no naked steel , and thus were already far over the sands of anfauglith before their approach was seen .