the one person from whom we had had some sign of sympathy in our attempts to get away was the young chief whom we had rescued. He alone had no desire to hold us against our will in a strange land. He had told us as much by his expressive language of signs. That evening, after dusk, he came down to our little camp, handed me (for some reason he had always shown his attentions to me, perhaps because I was the one who was nearest his age) a small roll of the bark of a tree, and then pointing solemnly up at the row of caves above him, he had put his finger to his lips as a sign of secrecy and had stolen back again to his people.
I took the slip of bark to the firelight and we examined it together. It was about a foot square, and on the inner side there was a singular arrangement of lines, which I here reproduce:
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They were neatly done in charcoal upon the white surface, and looked to me at first sight like some sort of rough musical score.
"Whatever it is, I can swear that it is of importance to us," said I. "I could read that on his face as he gave it."
"Unless we have come upon a primitive practical joker," Summerlee suggested, "which I should think
