But her concern for the spiritual welfare of those around her was especially manifest, and in most appropriate ways. She invited the children to come into her house every Sabbath day, for religious instruction. Feeling her own incompetency to instruct them fully, especially as she was herself unable to read, she obtained the assistance of other Christian people in this work. The well-known Isabella Graham thus aided Katy by occasionally inviting her little flock to come to her own house. Thus Katy's labor of love went on for some time, unobserved for the most part, even by Christian people, but not unnoticed by God. He smiled upon her, and as He often does in the case of humble efforts like hers, made her little school on the Sabbath the beginning of a great and good work in that city. It was about this time that the house of worship on Murray street, in which Dr. Mason preached, was built. This good man of God had not forgotten Katy, the trembling inquirer. Having heard of her Sabbath assembly of children, he went one day to see what she was doing. As he entered her lowly dwelling, and looked around upon the group of interested, happy-looking faces, he said, with his wonted kindness: "What are you about here, Katy? Keeping school on the Sabbath? We must not leave you to do all this." He immediately conferred with the officers of his church, telling them what he had seen, and advising that others should join Katy in this good work. Soon the lecture-room was opened for the reception and instruction of Katy's charge. This was the beginning of the Sabbath-school in the Murray Street Church; and KATY FERGUSON, the colored woman, who had been a slave, is believed to have thus gathered THE FIRST SABBATH SCHOOL IN THE CITY OF NEW YORK. But Katy's benevolent heart was not satisfied with this effort for the good of children. She established and maintained, during the last forty years of her life, a weekly prayer-meeting at her house, and during the last five years of her life, when she could not attend the public services of divine worship, she made her own house a Bethel on Sabbath afternoons, by gathering the neglected children of the neighborhood, with such others as did not attend at any place of public worship, and obtaining some suitable person to lead in the services of prayer and praise. The cause of foreign missions was also dear to Katy. On one occasion, a young man who was about to sail for Africa as a missionary, was invited to attend a meeting at her house. Three years afterwards, on speaking of this man and his associate missionaries, she said: "For these three years I have never missed a day but I have prayed for those dear missionaries."