out 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 dispatched 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; for all the world as if someone 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five pound note from the secret pocket in which I carried my paper money, I tied the string to it and it was instantly withdrawn.
