The opening quote is from A Christmas Carol by Charles Dickens. "I have but to swallow this, and be for the rest of my days persecuted by a legion of goblins, all of my own creation. Humbug, I tell you; humbug!"
When reading from the Grimm Diaries, Monroe reads about a giant fruit cake that "stood 7 cubits high and weighed 6 stone," estimating it to be 84 pounds. A cake of that size would indeed be 84 pounds, as well as approximately 10.3 feet tall.
The Diary entry also refers to Augustus II "the Strong", who was Elector of Saxony (1694-1733) as well as King of Poland and Grand Duke of Lithuania (1697-1706, 1709-1733); the Diary entry is dated December 1730, three years before Augustus's death.
This is the third Christmas episode of the series, confirming at least three years have passed since the pilot episode. ("Let Your Hair Down") ("Twelve Days of Krampus")