Some believe that the person or group responsible for the inscription had to have an extensive knowledge of the Hebrew language. Given that Wyrick made a large number of mistakes on the woodcuts seem to indicate that he may not have been the stone's author. Beverley H. Moseley, Jr., former art director of the Ohio Historical Society, compared the carving of Moses on the stone to Wyrick's woodcut copy. He concluded that both images couldn't have been made by the same person. After Wyrick's death, Colonel Charles Whittlesey published a paper in 1872 in which he recalls discovering a Hebrew Bible among Wyrick's personal items. Whittlesey concludes at the time that the stones were a hoax, and assumed that the Bible was Wyrick's source of inspiration for the inscription. This theory was later discredited after it was determined that the letters used on the Decalogue did not represent a style that would have been consistent with the theory.