Many superstitions grew up around moles. It was a common
error to believe that moles were blind, whereas in fact their eyes
are small and often hidden in the hair. As late as Shakepeares
time, moles were popularly believed to be blind, as indicated
Mitchell, T(homas) W(alker) Encyclopedia of Occultism & Parapsychology 5th Ed.
in the dramatists play The Tempest Pray you tread softly, that
the blind mole may not hear a footfall.
Other popular beliefs were that if moles came into a meadow
it was a sign of fair weather, that if a mole dug his hole very
deep, you could expect a very severe winter, and that if a mole
threw up earth during a frost, the frost would disappear in two
Some Gypsies believed that moles never touched earth that
had been stained with blood. In Britain, farm laborers used to
wear the forelegs and a hind leg of a mole in a bag around the
neck to protect against toothache. It was also believed that if
you pulled molehills up on St. Sylvesters Day (December 31),
the moles would not throw up earth again.