Roland's reaction was understandable, because the manuscript was made of weird triangular symbols.
They seemed to be a mess, but Roland had found that they were special spell models that were different from humans' elemental magic and elves' natural magic.
The first few pages were depictions of models, and the rest of the manuscript was written in a language of triangles that he had never seen before.
"Have you ever asked a Mage to decipher this?"
"I let a few trustworthy Mages read it, but none of them could understand it," Cage said with a bitter smile. "But one of them said that the words may be written in the devil language. So, I estimate that this manuscript might be a loot that my ancestors got. Now, few human beings can understand Elvish, not to mention the devil language. Besides, there are many kinds of devils, and there's no telling which dialect this is."
As a book lover and collector, Roland had learned more about this world.