12(1)Where the estate or interest upon which the lien attaches is leasehold, the fee simple is also subject to the lien if the person doing the work or supplying the material gives notice in writing by registered letter or personal service to the owner or his agent of the work to be done or the material to be furnished, and the owner or his agent fails within ten days thereafter to give notice to such person that he will not be responsible therefor.

12(2)No forfeiture or cancellation of a lease, except for nonpayment of rent, deprives any person otherwise entitled to a lien of the benefit of the lien; and that person may pay any rent due or accruing due and the amount so paid may be added to his claim.