As to Martin Harris--of late I have heard but little of him. My acquaintance with him induces me to believe him a monomaniac; he is a man of great loquacity and very unmeaning, ready at all times to dispute the ground of his doctrines with any one. He was one of the seceders, and for a time threatened the Mormons with exposure, as I have been informed; but where he is now I cannot say. Jo Smith is regarded as an inspired man by all the Mormons. Sidney Rigdon is at the western settlement; he embraced the Mormon religion in the latter part of October, 1830. See page 102 of the book as published by E. D. Howe, above referred to. In the early part of the year--either in May or June--I was in company with Sidney Rigdon, and rode with him on horseback a few miles. Our conversation was principally upon the subject of religion, as he was at that time a very popular preacher of the denomination calling themselves '_disciples_' or Campbellites. He remarked to me, that it was time for a new religion to spring up; that mankind were all rife and ready for it. I thought he alluded to the Campbellite doctrine--he said it would not be long before something would make its appearance--he also said that he thought of leaving for Pennsylvania, and should be absent for some months. I asked him how long--he said it would depend upon circumstances. I began to think a little strange of his remarks, as he was a minister of the Gospel. I left Ohio that fall, and went to the state of New York, to visit my friends, who lived in Waterloo--not far from the mine of golden Bibles. In November I was informed that my old neighbour, E. Partridge, and the Rev. Sidney Rigdon were in Waterloo, and that they both had become the dupes of Jo Smith's necromancies: it then occurred to me that Rigdon's new religion had made its appearance, and when I became informed of the Spalding manuscript I was confirmed in the opinion that Rigdon was at least accessary if not the principal in getting up this farce. Any information that I can give shall be done cheerfully. Respectfully, your obedient servant, S. ROSA.. REV. MR. HALL. _June 5th, 1841._ REV. JOHN A. CLARK, D. D. DEAR SIR: