Alleged statement from Oliver Cowdery expressing skepticism at the inspiration of the BOM.
Oliver Cowdery, Defence in a Rehearsal of My Grounds for Separating Myself from the Latter Day Saints (Norton, OH: Pressley's Job Office, 1839), [3]
Still, although favored of God as a chosen witness to bear testimony to the divine authority of the Book of Mormon, and honored of the Lord in being permitted, without money and without price, to serve as scribe during the translation of the Book of Mormon, I have some times had seasons of skepticism, in which I did seriously wonder whether the Prophet and I were men in our sober senses when he would be translating from plates through "the Urim and Thummim" and the plates not be in sight at all.
This source, attributed to Oliver Cowdery, is considered a forgery by most modern historians of early Latter-day Saint history.