Redick McKee to Arthur Deming (Jan 25, 1886):
“Mr. Spaulding told me that while at Pittsburg he frequently met a young man named Sidney Rigdon at Mr. Patterson’s bookstore and printing-office, and concluded that he was at least an occasional employee. He was said to be a good English and Latin scholar and was studying Hebrew and Greek with a view to a professorship in some college. He had read parts of the manuscript and expressed the opinion that it would sell [readily].
While the question of printing was in abeyance Mr. S. wrote to Mr. P. that if the document was not already in the hands of the printer he wished it to be sent [out] to him in order that he might amend it by the addition of a chapter on the discovery of valuable relics in a mound recently opened near Conneaut. In reply Mr. P. wrote him that the manuscript could not then be found, but that further search would be made for it. This excited Mr. Spaulding’s suspicions that Rigdon had taken it home. In a week or two it was found in the place where it had originally been deposited, and sent out to him. The circumstance of this finding increased Mr. S’s suspicions that Rigdon had taken the manuscript and made a copy of it with a view [to] ultimately publishing the story as the product of his own brain. Whether the manuscript was amended and returned to Mr. P. he did not tell me, but it probably was.”
Rev. Joseph Miller gave four statements (1869, 1879, Jan. and Feb. 1882) in which he connected Spalding to The Book of Mormon. In the latter three statements, he also connected Rigdon. For example, in his Feb. 1879 statement, he wrote:
“My recollection is that Spalding left a transcript of the manuscript with Patterson for publication. The publication was delayed until Spaulding could write a preface. In the meantime the manuscript was spirited away, and could not be found. Spaulding told me that Sidney Rigdon had taken it, or was suspected of taking it. I recollect distinctly that Rigdon’s name was mentioned in connection with it.” (Cowdrey et al., 2005, p. 124).