|BL Royal 6 E IX, f. 24 (s. XIV)|
Perhaps this divination method will help:
"'Bismille araathe mem lismissa [etc.]' When he has recited this conjuration, the master should look in the mirror, and he will see an armed knight seated on a horse, and his squire accompanying him. The knight will dismount from the horse... and then the master may ask him about past, present, and future things, and he will at once give full response in writing."
Anonymous Necromancer's Manual (15th century)
A clairvoyant knight in shining armor who specializes in essay questions? Sign me up.