law: Indian Easements Act, 1882
  41. Extinction on termination of necessity 
  An easement of necessity is extinguished when the necessity
  
  comes to an end.
  Illustration
  A grants B a field inaccessible except by passing over A's
  
  adjoining land. B, afterwards purchases a part of that land over which he can
  
  pass to his field. The right of way over A's land which B has acquired is
  
  extinguished.