"Another debt to the Earl of Argyll," Harry said grimly. "However, although this proves the treachery of his kinsman, it does not convict Argyll himself, although the evidence is strong enough to hang any other man. Now, Leslie, what do you advise? Shall we send and seize the man left at the hut?"

"It is a doubtful question," Leslie answered, after a pause. "When Campbell finds that his messenger does not return before morning, he will like enough send others off to learn the reason why. If they find him gone, Campbell may suspect that his plan has failed and may send warning to Cromwell."

"At any rate," Harry continued, "we need not decide before morning. But at daybreak, Leslie, plant a party of men on the road and stop any horseman riding out. Let the sergeant in charge say only that he has my orders that none are to pass eastward. It would be a natural precaution to take, and when the news comes back to the castle, Campbell will not necessarily know that his scheme has been detected."