496. Impugning landlord's title as ground for forfeiture.

There is implied in every lease a condition that the tenant is not to do anything that may prejudice the landlord's title, and that, if this is done, the landlord may re-enter for breach of this implied condition1. Thus, the landlord can forfeit the lease if the tenant denies the landlord's title by alleging in writing (or, in the case of a tenancy from year to year, either in writing or orally) that the title to the land is in himself or another2, or if he assists a third person to set up an adverse title (as where he