Even at common law the proper plaintiff in an action for the breach of a covenant running with the land is the holder of the title thereto at the time of breach, though he may not be the original grantee.1 The lessor may enforce restrictions on the use of the premises leased, either against an assignee,2 or a sublessee.3

When a covenant running with the land is broken, the right of action for such breach does not run with the land.4