It was the voice of a sentry on the outposts of Raincy, and I could have climbed down from my saddle and hugged him to my heart. Instead, I sat impassively in my saddle and gave him the countersign. I was conducted to the quarters of the commandant of artillery and I delivered my message.

"You have come quickly," he said. "What road did you take?"

"That of Chesnay and Gagny."

The commandant looked queerly at me.

"Did you?" said he. "You are lucky. You will return by Montfermeil and Chelles, Lieutenant von Altrock, and I will send an escort with you. Apparently we are better informed at Raincy than you are at Noisy-le-Grand."

"I knew there was danger, sir," I replied.

A regiment of dragoons was quartered at Raincy, and from it two privates and a corporal were given me for escort. In the company of these men I started back by the longer road in the rear of our lines. And it was a quarter to ten when I started. For I noticed the time of a clock in the commandant's quarters. I should think that it must have taken three-quarters of an hour to reach Montfermeil, for the snow was deep here and the mist very thick. Beyond Montfermeil, however, we came to higher ground; there were fewer drifts of snow, and the night began to clear, so that we made better going. We were now, of course, behind our lines, and the only risk we ran was that a few peasants armed with rifles from a battlefield or a small band of francs-tireurs might be lurking on the chance of picking off a straggler. But that risk was not very great now that there were four of us. I rode therefore with an easier mind, and the first thing which entered my thoughts was--what do you think? The old peasant-woman's cabin with the broken window? Not a bit of it. No, it was M. Bonnet's black sow. Had M. Bonnet's sow farrowed fifteen? Or was that litter of fifteen intended to inform the people in Paris by some system of multiplication of the exact number of recruits which had joined one of the French armies still in the field--say, General Faidherbe's, at Bapaume, and so to keep up their spirits and prolong the siege? I was still puzzling over this problem when in a most solitary place I came suddenly upon a château with lighted windows. This was the Château Villetaneuse. I reined in my horse and stopped. My escort halted behind me. It was after all an astonishing sight. There were many châteaux about Paris then, as there are now, but not one that I had ever come across was inhabited by more than a caretaker. The owners had long since fled. Breached walls, trampled gardens, gaping roofs, and silence and desertion--that is what we meant when we spoke of a chateâu near Paris in those days. But here was one with lighted windows on the first and second storeys staring out calmly on the snow as though never a Prussian soldier had crossed the Rhine. A thick clump of trees sheltered it behind, and it faced the eastern side of the long ridge of Mont Guichet, along the foot of which I rode--the side farthest from Paris. From the spot where I and my escort had halted an open park stretched level to the door. The house had, no doubt, a very homelike look on that cold night. It should have spoken to me, no doubt, of the well-ordered family life and the gentle occupations of women. But I was thinking of M. Bonnet's black sow. I was certain that none of our officers were quartered there and making the best of their Christmas night in France. Had that been the case, black paths and ruts would have been trampled in the snow up to the door, and before now I should have been challenged by a sentinel. No! The more I looked at the house and its lighted windows, the more I thought of M. Bonnet's sow. Was this solitary château the undiscovered last station on the underground road through which the news passed into Paris? If not, why was it still inhabited? Why did the lights blaze out upon the snow so late?

I commanded my escort to be silent. We rode across the park, and half-way to the door we came upon a wire fence and a gate. There we dismounted, and walked our horses. We tethered them to a tree about twenty yards from the house. I ordered one of my dragoons to go round the house, and watch any door which he might find at the back. I told the other two to stay where they were, and I advanced alone to the steps, but before I had reached them the front door was thrown open, and a girl with a lantern in her hand came out.

She held the lantern high above her head and peered forward, so that the light fell full upon her hair, her face, and dress. She was a tall girl and slight of figure, with big, dark eyes, and a face pretty and made for laughter. It was very pale now, however, and the brows were drawn together in a frown. She wore a white evening frock, which glistened in the lantern light, and over her bare shoulders she had flung a heavy, black, military cloak. So she stood and swung the lantern slowly from side to side as she stared into the darkness, while the lights and shadows chased each other swiftly across her white frock, her anxious face, and the waves of her fair hair.

"Whom do you expect at this hour, mademoiselle?" I asked.