Note 182 — Chapter X · LEGAL RIGHTS.
Reading edition
A power is usually combined with a liberty to exercise it; that is to say, the exercise of it is not merely effectual but rightful. This, however, is not necessarily the case. It may be effectual and yet wrongful; as when, in breach of my agreement, I revoke a licence given by me to enter upon my land. Such revocation is perfectly effectual, but it is a wrongful act, for which I am liable to the licensee in damages. I had a right (in the sense of power) to revoke the licence, but I had no right (in the sense of liberty) to do so: Wood v. Leadbitter, 13 M. & W. 838; Kerrison v. Smith, (1897) 2 Q. B. 445.