Keith’s head went round. Advancement at last—and good-bye to Scotland! But his heart was cold. There was a condition to this favour impossible of fulfilment.

He came forward a little. “If the honour your Royal Highness designs to do me,” he said in a very low voice, “depends upon my giving evidence against Cameron of Ardroy, I must beg leave, with the greatest respect, to decline it. But if it is without such a condition, your Royal Highness has no more grateful servant.”

“Condition, sir—what do you mean?” demanded the Prince sharply. “Are you trying to bargain with me?”

“Indeed, no, your Royal Highness. I thought,” ventured Keith, still very respectfully, “that it was rather the other way about . . . But I was no doubt mistaken.”

The pale, prominent eyes stared at him a moment, and their owner gave vent to what in any other but a scion of royalty would have been termed a snort. “Indeed you are mistaken, sir! I do not bargain with officers under my command; I give them orders. Be ready to start for Edinburgh to-morrow with the rest of my staff at the time I design to leave Fort Augustus. In England leave will be given you for the purpose of attending the trial of this rebel at Carlisle, whenever it shall take place. After that you will rejoin my staff and accompany me—or follow me, as the case may be—to the Continent. It is part of the duty of a commander-in-chief, gentlemen,” went on the Duke, addressing the remainder of the company, “to remember and reward individual merit, and Major Windham’s gallantry at Fontenoy has not passed from my mind, although I have not until now been able to recompense it as it deserves.”

The aides-de-camp, Sir Everard and even Lord Albemarle expressed in murmurs or in dumb show their appreciation of His Royal Highness’s gracious good memory. As for Keith, he was conscious of an almost physical nausea, so sickened was he by the unblushing hypocrisy of the bribe—it was nothing less. He looked at the ground as he answered.

“Your Royal Highness overwhelms me, and I hope to show my gratitude by always doing my duty—which is no more than I did at Fontenoy. But there are private reasons why I cannot give evidence against Cameron of Ardroy; I am too much in his debt for services rendered in the past. I appeal therefore to your Highness’s generosity to spare me so odious a task.”

The Duke frowned. “You forget, I think, Major Windham, with what kind of men we are dealing—bloody and unnatural rebels, who have to be exterminated like vermin—like vermin, sir! Here is a chance of getting rid of one rat the more, and you ask that your private sentiments shall be allowed to excuse you from that duty! No, Major Windham, I tell you that they shall not!”

Keith drew himself up, and this time he met Cumberland’s gaze full.

“I would beg leave to say to your Royal Highness, speaking as a soldier to the most distinguished soldier in Britain, that it is no part of military duty, even in the crushing of a rebellion, to play the informer.”