State Nat. Bank of El Paso, Tex.

BICKLEY, Justice.

Plaintiff’s complaint alleged that the defendant executed and delivered to the Western Heating and Engineering Co. of El Paso, Texas, his promissory note for a certain principal sum and interest, payable in monthly installments; that prior to the maturity of any installment of the note and without notice of any infirmity in said note, appellant purchased the same from the payee, paying value therefor and became a holder of said note in due course; that demand was made upon defendant for payment of the installments due and that defendant refused to pay same, and that plaintiff…