"That is a lie!" Captain Burton cried, starting up.
"Hush, Harold! Is it worth while arguing about? Let him go on. Well, Mr. van Zwieten, you have come to tell us this. What else?"
"I have come to offer you my assistance to escape."
"Oh! That is what I hardly expected to hear you say. And you must pardon me if I don't believe you."
"As you please," he said again. "But you can escape to-night if you will. The men here now I shall take away with me shortly. Two horses will be left behind--food is in the house; and here are a couple of revolvers--one for you and one for Burton."
They took the weapons in silence. Could this be Van Zwieten? They did not know him in this new rôle of self-abnegation, and the suspicions of both husband and wife were thoroughly aroused. But the revolvers were good ones, and they were loaded. Could it be that he spoke truly and that he was anxious now to retrieve his past, to give up his plotting and spying and to live a virtuous life amongst the too-moral Boers, who had indeed, perhaps, forced him to do this thing?
Still Brenda looked doubtfully at him, for compulsory righteousness was somewhat hard to credit.
"I see you don't believe me," he said, after a pause. "Well, perhaps you are right. It is rather late in the day for me to turn saint. But you may be sure I should not do this unless I had some very strong inducement. If you are taken to Pretoria you will only remain to vex my eyes, and I want to get you out of sight. That is my reason for giving you your freedom. To-night I will send a messenger who will guide you to the British outposts. They are not so far off as you think. Buller has advanced almost to Spion Kop, and he has taken several of our positions. If he gets Spion Kop--and I understand Warren intends to capture it if he can--he will have the key to our position and will march on to Ladysmith. But"--he shrugged his shoulders--"there is many a slip, you know. Well, I will go in and get my men. Will you follow my messenger?"
"I can't say yet," Captain Burton said bluntly. "You speak fair enough, but this may be a trick for all I know."
"How should I benefit by a trick?" Van Zwieten asked. "If I wanted to kill you I could do it now, and no one would be the wiser. The Boers here would shoot you with pleasure. But if I killed you and took Mrs. Burton, why, then, good-bye to my chance of becoming President of the Confederate States of South Africa. No, I will let you go; it suits me better. Love, as I said, must yield to ambition. But if you do not believe me, stay here. My messenger shall come at eight o'clock to-night. Follow him or not as you please. Good-bye, Mrs. Burton. You little know what it is to me to give you up; but you must say I afford you every chance of being happy with your husband."