One important feature of the work of the Sunday School Society was the extension of the cause it represented. In December, 1829, reports were presented at the annual meeting from nearly fifty schools; and it was thought desirable that they should be brought into closer relations with the society. Accordingly, Frederick T. Gray, the secretary, visited many of these schools. The next year, as a result, a considerable number of those outside the city connected themselves with the society; and the lists of vice-presidents and directors were enlarged to include them in its operations. Afterwards this work was carried on by a committee of the society, the members of which visited the schools, giving addresses, and in other ways helping to give strength and purpose to the work in which they were engaged. Schools were visited in Maine, New Hampshire, Massachusetts, Rhode Island, New York, Pennsylvania, Kentucky, and other states. To give better opportunity for the attendance of delegates from schools outside the city, the yearly meeting was changed from December to anniversary week in May. The society published a considerable number of tracts, which were distributed gratuitously by the agents and in other ways. It also issued lesson-books, as well as books for the juvenile libraries which were forming at this time in all the churches. To meet this demand, the younger Henry Ware began editing, in 1833, the Sunday-school Library for Young Persons, in which were included his own Life of the Saviour, Mrs. John Farrar's Life of Howard, Rev. Stephen G. Bulfinch's Holy Land, and Rev. Thomas B. Fox's Sketch of the Reformation. The next year Mr. Ware began a series of books which he called Scenes and Characters illustrating Christian Truth. Another method used by the society was the giving of expository lectures. The society at first held quarterly meetings; but the interest grew, and the meetings became monthly. Great enthusiasm was felt at this time in regard to the work of these schools, and many persons of prominence praised them and took part in their management. "The institution of Sunday-schools constitutes one of the most remarkable features of the present age," wrote Dr. Joseph Allen, in 1830. "It has already done much to supply the deficiencies of domestic education, and, if wisely conducted, is destined, we trust, to become at no distant day one of the most efficient instruments in forming the characters of the young."[7] Writing in 1838, the younger Henry Ware said that "the Sunday-school has become one of the established institutions of religion in connection with the church, and the character of religion is henceforth to depend, in no small degree, on the wisdom with which it shall be administered."[8]