"Wait a moment!" she suddenly exclaimed, sitting up very straight and wiping her glasses again in great excitement. "I believe I have the explanation." She looked about at her audience a minute, hesitantly. "I shall have to ask you girls please to keep what I am going to tell you entirely to yourselves. Few if any have ever known of it, and, though it would do no harm now, I have other reasons for not wishing it discussed publicly. Since you have discovered what you have, however, I feel it only right that you should know." "You may rely on us, Miss Camilla," said Doris, speaking for them both, "to keep anything you may tell us a strict secret." "Thank you," replied their hostess. "I feel sure of it. Well, I learned the fact, very early in my girlhood, that my father and also my brother, who was several years older than I, were both very strict and enthusiastic abolitionists. While slavery was still a national institution in this country, they were firm advocates of the freedom of the colored people. And, so earnest were they in the cause, that they became members of the great 'Underground Railway' system." "What was that?" interrupted both girls at a breath. "Did you never hear of it?" exclaimed Miss Camilla in surprise. "Why, it was a great secret system of assisting runaway slaves from the Southern States to escape from their bondage and get to Canada where they could no longer be considered any one's property. There were many people in all the Northern States, who, believing in freedom for the slaves, joined this secret league, and in their houses runaways would be sheltered, hidden and quietly passed on to the next house of refuge, or 'station,' as they were called, till at length the fugitives had passed the boundary of the country. It was, however, a severe legal offense to be caught assisting these fugitives, and the penalty was heavy fines and often imprisonment. But that did not daunt those whose hearts were in the cause. And so very secret was the whole organization that few were ever detected in it. "It was in a rather singular way that I discovered my father to be concerned in this matter. I happened to be at home here, and came downstairs one morning, rather earlier than usual, to find our kitchen filled with a number of strange colored folk, in various stages of rags and hunger and evident excitement. I was a girl of ten or eleven at the time. Rushing to my father's study, I demanded an explanation of the strange spectacle. He took me aside and explained the situation to me, acknowledging that he was concerned in the 'Underground Railway' and warning me to maintain the utmost secrecy in the matter or it would imperil his safety.