It appears that several years ago plaintiff let certain premises in the city of St. Louis to defendant at the agreed rental of $150' per month. The tenancy was from month to month only and defendant occupied the premises some three or four years before the institution of this suit. The1 present suit proceeds for the recovery of the rent for the month of November, 1909 (which, it is asserted, is $750), evidently on the theory that a new tenancy was created by the conduct of the parties subsequent to the original letting. The case concedes that the original letting of the premises was from month to month and at the agreed rental of $150 per month, and that the relation of the parties thus created continued until November 1, 1909. However, plaintiff sought to continue the relation of landlord and tenant existing under the original letting at an increased rental from and after the first of September of that year, for it appears that on July 19, 1909, *191he served on defendant a notice to the effect that $300 per month rental would be exacted from and after September first. Defendant did not accede to this demand for increased rent and continued in possession of the premises as before. Subsequently plaintiff instituted two suits against defendant for such increased rent for September and October, but the finding and judgment in each of these were for defendant.