Easement acquisition by prescription

The illustrations given below may clarify your doubts 

Illustrations

(a) A suit is brought in 1883 for obstructing a right of way. The defendant admits the obstruction, but denies the right of way. The plaintiff proves that the right was peaceably and openly enjoyed by him, claiming title thereto as an easement and as of right, without interruption, from 1st January, 1862, to 1st January, 1882. The plaintiff is entitled to judgment.

(b) In a like suit the plaintiff shows that the right was peaceably and openly enjoyed by him for twenty years. The defendant proves that for a year of that time the plaintiff was entitled to possession of the servient heritage as lessee thereof and enjoyed the right as such lessee. The suit shall be dismissed, for the right of way has not been enjoyed "as an easement" for twenty years.

(c) In a like suit the plaintiff shows that the right was peaceably and openly enjoyed by him for twenty years. The defendant proves that the plaintiff on one occasion during the twenty years had admitted that the user was not of right and asked his leave to enjoyed the right. The suit shall be dismissed, for the right of way has not been enjoyed "as of right" for twenty years.