law: Indian Easements Act, 1882
  61. Revocation express or implied
  The revocation of a License may be express or implied.
  Illustrations
  (a) A, the owner of a field, grants a license to B, to use a path
  
  across it. A with intent to revoke the license, locks a gate across the path.
  
  The license is revoked.
  (b) A, the owner of a field, grants a license to B to stack hay
  
  on the field. A lets or sells the field to C. The license is revoked.