But what is it?’ she answered, looking troubled. ‘It was so sudden. I am—I did not understand. You quarrelled so quickly.’

‘It is very simple,’ I answered, smiling. ‘M. le Capitaine insulted you yesterday; he will pay for it to-day. That is all. Or, not quite all,’ I continued, dropping my voice and speaking in a different tone. ‘His removal may help you, Mademoiselle. Do you understand? I think that there will be no more searching to-day.’ She uttered an exclamation, grasping my arm and peering into my face.

‘You will kill him?’ she muttered.

I nodded.

‘Why not?’ I said.

She caught her breath, and stood with one hand clasped to her bosom, gazing at me with parted lips, the blood mounting to her checks. Gradually the flush melted into a fierce smile.

‘Yes, yes, why not?’ she repeated between her teeth. ‘Why not?’ She had her hand on my arm, and I felt her fingers tighten until I could have winced. ‘Why not? So you planned this—for us, Monsieur?’

I nodded.

‘But can you?’

‘Safely,’ I said; then, muttering to her to take her sister upstairs, I turned towards the garden. My foot was already on the threshold, and I was composing my face to meet the enemy, when I heard a movement behind me. The next moment her hand was on my arm.