Although legendary for this feat, the story of Aminadi's interpretation doesn't make it into the Book of Mormon anywhere else but in this little vignette from Amulek. At any rate, the Aminadi interpretation has obvious similarities to the story of Daniel interpreting the writing on the wall of king Belshazzar's palace (Dan 5:5,25-28). Unfortunately, we do not know what the message was that Aminadi interpreted. As Mormon admits more than once, some things had to be left out, I cannot write the hundredth part of the things of my people (W of M 1:5).