Gordon B. Hinckley voices his rejection of both the Solomon Spaulding and View Of The Hebrews theories for the origins of the BOM.
Gordon B. Hinckley, "My Testimony," General Conference, October 1993
I thank the Almighty for my testimony of the Book of Mormon, this wonderful companion to the Holy Bible. It is strange to me that unbelieving critics must still go back to the old allegations that Joseph Smith wrote the book out of ideas gained from Ethan Smith’s View of the Hebrews and Solomon Spaulding’s manuscript. To compare the Book of Mormon with these is like comparing a man to a horse. It is true they both walk, but beyond this there is little similarity. The test of the book is in its reading. I speak as one who has read it again and again and tasted of its beauty and depth and power. Could Joseph Smith, I ask you, the young man reared in rural New York largely without schooling, have dictated in so short a time a volume so complex in its nature and yet so harmonious in its whole, with so large a cast of characters and so extensive in its scope? Could he of his own abilities have created the language, the thought, the moving inspiration that has caused millions over the earth to read and say, “It is true”?