But to catch a mouse was easier said than done. Though the room was alive with them they were so nimble and so cunning, that, try how we would, we could not lay hold of one. But at length my efforts were rewarded, and after a little struggle I held my precious captive in my hand. By this time another idea had come to me. If we wanted to bring Nikola and his gang to justice, and to discover their reason for hatching this plot against us, it would not do to ask the public at large for help—and I must own, in spite of our long imprisonment, I was weak enough to feel a curiosity as to their motive. No! It must be to the beggar who passed the house every morning that we must appeal.
"This letter concerns you more than me," I said to my fellow-prisoner. "Have you a lead pencil in your pocket?"
He had, and immediately threw it across to me. Then, taking a small piece of paper from my pocket, I set myself to compose the following in French and English, assisted by my companion:—
"If this should meet the eye of the individual to whom a young Englishman gave half a sovereign in charity three weeks ago, he is implored to assist one who assisted him, and who has been imprisoned ever since that day in the room with the blank wall facing the street and the boarded-up window on the right-hand side. To do this he must obtain a small file and discover a way to convey it into the room by means of the small pipe leading through the blank wall into the street; perhaps if this could be dislodged it might be pushed in through the aperture thus made. On receipt of the file an English five-pound note will be conveyed to him in the same way as this letter, and another if secrecy is observed and those in the house escape."
This important epistle had hardly been concocted before the door was unlocked and our dusky servitor entered with the evening meal. He had long since abandoned his first habit of bringing us our food in separate receptacles, but conveyed it to us now in the saucepan in which it was cooked, dividing it thence into our basins. These latter, it may be interesting to state, had not been washed since our arrival.
All the time that our jailer was in the room I held my trembling prisoner in my hand, clinging to him as to the one thing which connected us with liberty. But the door had no sooner closed upon him than I had tilted out my food upon the floor and converted my basin into a trap.
It may be guessed how long that night seemed to us, and with what trembling eagerness we awaited the first signs of breaking day. Directly it was light I took off and unravelled one of my socks. The thread thus obtained I doubled, and having done this, secured one end of it to the note, which I had rolled into a small compass, attaching the other to my captive mouse's hind leg. Then we set ourselves to wait for six o'clock. The hour came; and minute after minute went by before we heard in the distance the tapping of the crutches on the stones. Little by little the sound grew louder, and then fainter, and when I judged he was nearly at my back, I stooped and thrust our curious messenger into the pipe. Then we sat down to await the result.
As the mouse, only too glad to escape, ran into the aperture, the thread, on which our very lives depended, swiftly followed, dragging its message after it. Minutes went by; half an hour; an hour; and then the remainder of the day; and still nothing came to tell us that our appeal had been successful.
That night I caught another mouse, wrote the letter again, and at six o'clock next morning once more despatched it on its journey. Another day went by without reply. That night we caught another, and at six-o'clock next morning sent it off; a third, and even a fourth, followed, but still without success. By this time the mice were almost impossible to catch, but our wits were sharpened by despair, and we managed to hit upon a method that eventually secured for us a plentiful supply. For the sixth time the letter was written and despatched at the moment the footsteps were coming down the street. Once more the tiny animal crawled into the pipe, and once more the message disappeared upon its journey.
Another day was spent in anxious waiting, but this time we were not destined to be disappointed. About eight o'clock that night, just as we were giving up hope, I detected a faint noise near my feet; it was for all the world as if some one were forcing a stick through a hole in a brick wall. I informed Beckenham of the fact in a whisper, and then put my head down to listen. Yes, there was the sound again. Oh, if only I had a match! But it was no use wishing for what was impossible, so I put my hand down to the pipe. It was moving! It turned in my hand, moved to and fro for a brief space and then disappeared from my grasp entirely; next moment it had left the room. A few seconds later something cold was thrust into my hand, and from its rough edge I knew it to be a file. I drew it out as if it were made of gold and thrust it into my pocket. A piece of string was attached to it, and the reason of this I was at first at some loss to account for. But a moment's reflection told me that it was to assist in the fulfilment of our share of the bargain. So, taking a five-pound note from the secret pocket in which I carried my paper money, I tied the string to it, and it was instantly withdrawn. A minute could not have elapsed before I was at work upon the staple of my collar, and in less than half an hour it was filed through and the iron was off my neck.