A shiver passed through her as she caught sight of him. For it was her enemy, Van Zwieten.

[CHAPTER XXII.]

AT THE FRONT.

Van Zwieten's sins had evidently made no difference in his fortunes. He appeared to be flourishing like the proverbial green bay tree. He was dressed in a smart riding suit, with long brown boots, and a smasher hat of the approved Boer type. Quite unabashed at sight of Brenda, he crossed the road with an impudent smile and held out his hand. She shot one glance of indignation at him, and drew aside as though to avoid contact with an unclean thing--a proceeding which appeared to cause the man some shame, although he tried to assume an air of unconcern and amusement.

"You won't shake hands with me, Mrs. Burton?" he said, quite jauntily.

"How dare you speak to me?" she said, drawing back. "I wonder you are not ashamed to look me in the face after that trick about the letter."

"Ah! that was what the Boers call 'slim,'" he said, wincing, nevertheless, at her open contempt for him. "All's fair in love and war, you know, but your husband has been rather in advance of himself on this occasion, and the plot has failed. Yes, you see I admit that it is a plot, and I admit that it has failed."

"I have nothing to say to you," said Brenda, coldly, "except to tell you that if you attempt to molest either my husband or myself further I shall have you arrested as a spy."

He looked uneasily down the road and at the stern, set faces of the passing soldiers. He knew that from such men as they he might expect precious little mercy once the word spy had gone out against him, followed by damning evidence of his complicity. Boer treachery had to be avenged; there had been plenty of it about, and he did not fancy being a scapegoat for others.

"My dear Mrs. Burton," he went on calmly, "I wonder you spare me at all. Why not have me arrested now and have done with it? I am completely in your power, am I not? You have but to raise your voice and the thing would be done. Indeed, I am not at all sure that I should reach the jail alive. They hate spies here, and it is true they have good reason to. You may not have such a chance again, so cry out upon me now and revenge yourself on me once and for all for my crime--my crime of loving you."