The Dakota mission had been, from its commencement, under the American Board of Commissioners for Foreign Missions. As Presbyterians, we had been connected with the New School branch. But now the two schools had been united. Many--nay, most--of the New School Assembly, who had worked with the American Board, now thought it their duty to withdraw, and connect themselves and their contributions with the Assembly's Board of Foreign Missions. The ploughshare must be run through the mission fields also. We in the Dakota mission were invited to transfer our relations. The prudential committee at Boston left us to act out our own sweet will. Dr. T. S. Williamson and Rev. John P. Williamson elected to go over to the Presbyterian Board. For myself, I did not care to do so. Although conscientiously a Presbyterian, I was not, and am not, so much of one as to draw me away from the associations which had been growing for a third of a century. Whether I reasoned rightly or wrongly, I conceived that I had a character with the American Board that I could not transfer; and I was too old to build up another reputation. Besides, Alfred L. Riggs had now joined the mission, and as a Congregational minister he could do no otherwise than retain his connection with the A.B.C.F.M. The case was a plain one. We divided. Some questions then came up as to the field and the work. These were very soon amicably settled, on a basis which, so far as I know, has continued to be satisfactory from that day to this. The churches on the Sisseton reservation and at the Santee were to continue in connection with the American Board; while the Big Sioux and Yankton agency churches would be counted as under the Presbyterian Board. Henceforth, in regard to common expenses of Dakota publications, _they_ were to bear _one-third_, and _we two-thirds_. CHAPTER XVIII. 1870-1873.--A. L. Riggs Builds at Santee.--The Santee High School.--Visit to Fort Sully.--Change of Agents at Sisseton.--Second Marriage.--Annual Meeting at Good Will.--Grand Gathering.--New Treaty Made at Sisseton.--Nina Foster Riggs.--Our Trip to Fort Sully.--An Incident by the Way.--Stop at Santee.--Pastor Ehnamane.--His Deer Hunt.--Annual Meeting in 1873.--Rev. S. J. Humphrey's Visit.--Mr. Humphrey's Sketch.--Where They Come From.--Morning Call.--Visiting the Teepees.--The Religious Gathering.--The Moderator.--Questions Discussed.--The _Personnel_.--Putting up a Tent.--Sabbath Service.--Mission Reunion.