the pine trees spreading round on every side. There was no need of a pathway here where all was open. Once or twice as I searched the thought came to me that there might be some opening here to a secret way or hiding place; but look how I would, I could not find the faintest trace or suggestion of any opening. In the end I had to take it that the erection was merely a monument or mark of some kind, whose original purpose was probably lost in time.
At last, as the day was well on, I made my way back to where my bicycle was hidden, always taking care to keep from observation. Then emerging on the road, I went as usual through the old ruined gateway and the long winding avenue to the castle.
Marjory met me with an anxious look, and hung on to my arm lovingly as she said:
"Oh, you are late! I have been quite nervous all the morning lest anything should have happened to you!" Mrs. Jack, after we had greeted, discreetly left us alone; and I told my wife of all that I had thought since we had parted, and of what I had seen on the hill top. She was delighted at the idea of a means of signalling; and insisted on my coming at once to the roof to make further arrangements and discoveries.
We found the spot which I had indicated admirably adapted for our purpose. One could sit on the stone roof, well back from the wall, and through one of the openings in the castellation see the top of the monument amongst the tree tops; and could yet be unobserved oneself from any other spot around. The angles of the castellation of the various walls shut out the tops of the other hills or mounds on every side. As the signs of our code were already complete we had only to fix on some means of signalling 'A' and 'B'. This we did by deciding that by daylight A should be signified by red and B by white
