Theoria

Should you have vermin problems, you might be able to save a few hundred dollars by trying these spells instead of calling an exterminator.

Spell of pagan origin to get rid of field-mice reported by Cassianus Bassus:

Take a slip of paper and write on it these words: I adjure you, O mice, who dwell here not to injure me yourselves nor to permit any other mouse to do so; and I make over to you this field (describing it). But should I find you staying here after having been warned, with the help of the mother of the gods I will cut you in seven pieces.

Spell cast by Pope Stephen VI in the 9th century outside Rome:

I adjure thee, creature water, I adjure thee by the living God, by Him, who at the beginning separated thee from the dry land, by the true God, who caused thee to fertilize the garden of Eden and parted thee into four heads, by Him, who at the marriage of Cana changed thee into wine, I adjure thee that thou mayst not suffer any imp or phantom to abide in thy substance, that thou mayst be indued with exorcising power and become a source of salvation, so that when thou art sprinkled on the fruits of the field, on vines, on trees, on human habitations in the city or in the country, on stables, or on flocks, or if any one may touch to taste thee, thou shalt become a remedy and a relief from the wiles of Satan, that through thee plagues and pestilence may be driven away, that through contact with thee weevils and caterpillars, locusts and moles may be dispersed and the maliciousness of all visible and invisible powers hostile to man be brought to naught.

Letter recorded in William Wells Newell (1892) “Conjuring Rats,” The Journal of American Folklore 5(16), 23-32. The author of the letter covered it in grease and shoved it into the rats’ hole so as to ensure that they’d both find it and read it.

[redacted] Maine, October 31, 1888.
MESSRS. RATS AND Co.,
Having taken quite a deep interest in your welfare in regard to your winter quarters I thought I would drop you a few lines which might be of some considerable benefit to you [redacted] No. 1 Seaview Street, I wish to inform you that you will be very much disturbed during cold winter months as I am expecting to be at work through all parts of the house, shall take down ceilings, take up floors, and clean out every substance that would serve to make you comfortable, likewise there will be nothing left for you to feed on, as I shall remove every eatable substance; so you had better take up your abode elsewhere. I will here refer you to the farm of [redacted] No. 6 Incubator Street, where you will find a splendid cellar well filled with vegetations of (all) kinds besides a shed leading to a barn, with a good supply of grain, where you can live snug and happy. Shall do you no harm if you heed to my advice; but if not, shall employ “Rough on Rats.”
Yours,
[redacted]