Usual Covenants
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
The usual covenants expressed in a deed are "seisin" or "right to convey," "quiet enjoyment," "further assurance," "warranty," and "against incumbrances." Ii) a lease, the covenant of quiet enjoyment is the only one that is always usual, the question being determined by circumstances and the custom of a locality.
Rawle, Gov.; Tayl. Landl. & Ten. § 45.