The second evidence that the Mormon Church has not been faithful to The Holy Book of Mormon is the lack of additional records:
9 And when they shall have received this, which is expedient that they should have first, to try their faith, and if it shall so be that they shall believe these things then shall the greater things be made manifest unto them.
10 And if it so be that they will not believe these things, then shall the greater things be withheld from them, unto their condemnation. (3 Nephi 26)