DEAR SIR—Agreeably to your request I forward you some facts in regard to the establishment and progress of the gospel among the natives of this reservation. The Cattaraugus Mission Church was organized July 8th, 1827, (which is a little more than 18 years.) It consisted of Mr. Wm. A. Thayer, the teacher, his wife, and 12 native members. There have been additions to it from time to time, until the whole number who have held a connection with this church is one hundred and eighteen. Thirteen of these have been white persons and most of them connected with the mission family. Of the one hundred and five native members seven or eight have come by letter from other reservations, so that the number who have united on profession of faith is a little short of one hundred. Twenty-five of these have gone to their final account. Some have died in the triumphs of faith, and we humbly hope and trust that they are among the blessed, in the kingdom of our common Father. A number (as it was natural to expect from converts out of heathenish darkness) have apostatized from Christianity, and returned to their former courses. The proportion of these is not probably more than one in ten. Between sixty and seventy are now connected with some of the mission churches. A few only have removed to Allegany, Tuscarora, while the remainder still live on this reservation. The effect of the gospel in promoting morality and civilization, may be learned in part from the fact that the public worship of God has been steadily maintained ever since the organization of the church, with members ranging from fifty to one hundred, and sometimes one hundred and fifty and two hundred as regular hearers of the word. A Sabbath school has been sustained a considerable share of the time. Many copies of the Holy Scriptures, and the New Testament, together with tracts, Sabbath school books, temperance papers, and religious periodicals, have been circulated among the children and youth. Temperance societies have been patronized by nearly all the chiefs and leading men on the reservation. Pledges have been circulated and received the signatures of a large majority of the population, of all parties, on the Washingtonian plan. Day schools for teaching the English language have been kept in operation almost without interruption for more than twenty years, under the patronage of the A. B. C. F. M.