'Stop for a moment;' then standing beside him, she continued, 'Ask me to-morrow.'

'If I am alive I will!' he laughed.

He felt her hand move with a quick tremor on his arm.

'I knew it! Which of them has challenged you? Unziar?' The swift question, echoing his own thought, took him completely by surprise.

He passed his arm round her, for the waltz was nearing its end.

'Shall we go on? No; no one has done me the honour of sending me a challenge.'

'Let us have an end of this absurd mystery!' said the girl impatiently. 'I am Valerie Selpdorf, and you are——'

'John Rallywood of the Guard of Maäsau!' he interposed. 'I had my commission from you in the ante-room of the Hôtel du Chancelier. But for that I should have been more than half inclined to refuse it.'

'I wish you had refused it! It may cost you—more than a man cares to pay. I thought my father held the power to give any commission he pleased, but one can never reckon with the Guard. They mean to kill you, Captain Rallywood! I wanted to warn you, but I think you know more, perhaps, than I can tell you or than you will tell me. What is going to happen? I want to help you—you must let me help you!'

Rallywood laughed, but perhaps his arm drew her a little closer as they moved more slowly during the concluding bars of the waltz.