Official Hintsheet 

·   Examine well the dried-up pond.
·   Conversation, overheard within the White Horse Inn, will explain the 
policeman's reluctance to let you pass him.
·   In order to proceed to the stones you will need to divert his attention. The 
acquisition of an antique will be helpful in this matter.
·   To avoid being recognised you will need to change your appearance, twice.
·   The pixie is open to temptation.
·   At first appearance the black dog may be fetching but will it swallow your 
ruse a second time?
·   An entrance to, and exit from, the fairy world exists when the full moon 
shines.
·   There is a break in the clouds for only a short while.
·   A message, in old words, should be exactly followed in order to transform 
the single stone.
·   Once the princess is reverted to stone the game is beyond solution.
·   To reverse the wizard's spell you should copy his actions.