"When I returned to the kitchen, to my astonishment, the whole crowd had mysteriously disappeared, though I had not been gone fifteen minutes. And I could not learn from any one a satisfactory explanation of their lightning disappearance. I should certainly have seen them, had they gone away above ground. I believe now that the cave and tunnel must have been the means of secreting them, and I haven't a doubt that my father and brother had had it constructed for that very purpose. A runaway, or even a number of them, could evidently be kept in the cave several days and then spirited away at night, probably by way of the river and some vessel out at sea that could take them straight to New York or even to Canada itself. Yes, it is all as clear as daylight to me now." "But how do you suppose they were able to build the cave and tunnel and bring all the wood from the wreck on the beach without being discovered?" questioned Sally. "That probably was not so difficult then as it would seem now," answered Miss Camilla. "To begin with, there were not so many people living about here then, and so there was less danger of being discovered. If my father and brother could manage to get men enough to help and a number of teams of oxen or horses such as he had, they could have brought the wreckage from the beach here, over what must then have been a very lonely and deserted road, without much danger of discovery. If it happened that at the time they were sheltering a number of escaped slaves, it would have been no difficult matter to press them into assisting on dark nights when they could be so well concealed. Yes, I think that was undoubtedly the situation." They all sat quietly for a moment, thinking it over. Miss Camilla's solution of the cave and tunnel mystery was clear beyond all doubting, and it seemed as if there was nothing further for them to wonder about. Suddenly, however, Sally leaned forward eagerly. "But did we tell you about the strange piece of paper we found under the old mattress, Miss Camilla? I've really forgotten what we did say." Miss Camilla looked perplexed. "Why, no. I don't remember your mentioning it. Everything was so confused, at first, that I've forgotten it if you did. What about a piece of paper?" "Here is a copy of what was on it," said Sally. "We never take the real piece away from where we first found it, but we made this copy. Perhaps you can tell what it all means." She handed the paper to Miss Camilla, who stared at it for several moments in blank bewilderment. Then she shook her head. "I can't make anything of it at all," she acknowledged. "It must have been something left there by one of the fugitives. I don't believe it concerns me at all." She handed the paper back, but as she did so, a sudden idea occurred to Doris. "Mightn't it have been some secret directions to the slaves left there for them by your father or brother?" she suggested. "Maybe it was to tell them where to go next, or something like that."