from
Bouvier's Law Dictionary, Revised 6th Ed (1856)
COVENANT FOR QUIET ENJOYMENT. A covenant usually contained in a lease, by
which the lessor covenants or agrees that the tenant shall quietly enjoy the
premises leased. 11 East, 641.
2. Such a covenant is express or implied; express, when it is so
mentioned in the deed it is implied, either from the words used, or from the
conduct of the lessor. The words "grant" or "demise" are held to amount to
an implied covenant for quiet enjoyment, unless afterwards restrained by a
qualified express covenant. 1 Chit. Pr. 344.