A species of es-tate less than freehold, where lands and tenements are let by one man to another, to have and to hold at the will of the lessor; and the tenant by force of thls lease obtains pos-session. 2 Bl. Comm. 145; 4 Kent, Comm. 110; Lltt $ 68. or lt is where lands are let without limiting any certain and determinate estate. 2 Crabb, Real Prop. p. 403, $ 1543