She and Margery and I had been sitting on the wide stone wall that runs above the South Farms lower mowing. It IS a very old wall, with its orig inal central portion buttressed and widened by the stone ploughed out of the adjoining fields. Sitting on one side of it, with the girls on the other, while we were chatting I had carelessly pried up a broad ?at stone that lay in the middle, between us three. Then, almost grown man as I was, my heart began to beat wildly, I panted for breath, and I felt my eyes straining at my find. For there, in a little cavity carefully made beneath the stone, lay the Flat Oblong Box.