St. Joseph Weekly Herald reports anonymous source that says they heard Martin Harris bear testimony of the BOM on his deathbed.
"Latter Day Saints," St. Joseph Weekly Herald 22, no. 15 (April 17, 1884): 2
Another man arose and bore testimony that he stood by the death bed of Martin Harris, one of three witnesses who saw the plates from which the Book of Mormon was translated, and heard his dying testimony that the book was true, and the voice of God had declared it unto him.