Since I assume—based on the similarities in the balneology section regarding body parts—that this might be related to anatomy, the cipher in this case would not be optimized for readability, but rather for the highest possible encryption factor.
In the 15th century, the study of anatomy was extremely dangerous in the staunchly "Catholic" region of Bavaria.
In the 15th century, the study of anatomy was extremely dangerous in the staunchly "Catholic" region of Bavaria.