law: Court Fees Act, 1850 
  25.Acquisition of easement by prescription .- 
  (1) Where the access and use of light or air to and for any
  
  building have been peaceably enjoyed therewith as an easement, and as of right,
  
  without interruption, and for twenty years, and where any way or watercourse or
  
  the use of any water or any other easement (whether affirmative or negative)
  
  has been peaceably and openly enjoyed by any person claiming title thereto as
  
  an easement and as of right without interruption and for twenty years, the
  
  right to such access and use of light or air, way, watercourse, use of water,
  
  or other easement shall be absolute and indefeasible.
  
  
  (2) Each of the said periods of twenty years shall be taken to be a period ending
  
  within two years next before the institution of the suit wherein the claim to
  
  which such period relates is contested.
  (3) Where the property over which a right is claimed under
  
  sub-section (1) belongs to the Government that sub-section shall be read as if
  
  for the words "twenty years" the words "thirty years" were
  
  substituted.
  Explanation.--  Nothing is an interruption within the meaning
  
  of this section, unless where there is an actual discontinuance of the
  
  possession or enjoyment by reason of an obstruction by the act of some person
  
  other than the claimant, and unless such obstruction is submitted to or
  
  acquiesced in for one year after the claimant has notice thereof and of the
  
  person making or authorized the same to be made.