The Decalogue Stone is a large stone (80 tons) located in Los Lunas, New Mexico in America with an ancient Paelo-Hebrew inscription of the Ten Commandments.
This passage talks about other books that come from the Gentiles unto the ‘remnant of Nephi’s brethren’ and the purpose of these records which is stated as ‘convincing’ both Gentiles and the remnant of Nephi’s brethren.