521. Nature of surrender.

A surrender is a voluntary act of the parties whereby, with the landlord's consent, the tenant surrenders his lease to the landlord so that the lease merges with the reversion and is thus brought to an end1. It is defined as being the yielding up of the term to the person who has the immediate estate in reversion in order that, by mutual agreement, the term may merge in the reversion2. The surrender may be either express (that is, by an act of the parties having the expressed intention of effecting a surrender) or by operation of law (that