William Wright lists a few common folk remedies for deafens in vol.3 of ‘The Aurist’ (1825), among some, which should be inserted into the ear:

-oil of large earthworms
-fat of eel
-cast skin of serpent boiled in wine
-wood lice, bruised and heated with rose oil
-ant’s eggs, bruised and strained
-fat of cow’s feet
-yolk of eggs
-fat of fox’s lungs
-goose or duck or hen’s grease