midnight
His brother Frederick lived here in the castle with him , and had a flirtation with Leonore von Luzelstein , a lady of the court , whom he afterwards despised , and was consequently most cordially hated by her . Frompolitical motives he was equally hateful to certain petty German tyrants , who , in order to effect his ruin , accused him of heresy . But his brother Louis would not deliver him up to their fury , and they resolved to effect by stratagem , what they could not by intrigue . Accordingly , Leonore von Luzelstein , disguised as the Virgin Mary , and the father confessor of the Elector , in the costume of Satan , made their appearance in the Elector 's bed-chamber at midnight , and frightened him so horribly , that he consented to deliver up his brother into the hands of two Black Knights , who pretended to be ambassadors from the Vehm-Gericht . They proceeded together to Frederick 's chamber ; where luckily old Gemmingen , a brave soldier , kept guard behind the arras . The monk went foremost in his Satanic garb ; but , no sooner had he set foot in the prince 's bed-chamber , than the brave Gemmingen drew his sword , and said quaintly , ` Die , wretch ! ' and so he died .