Effective - 28 Aug 1939
139.070. Mortgagee or other lienholders — payment of taxes. — Any person who has a lien by mortgage or otherwise, upon any real property upon which the taxes have not been paid, may pay such taxes and the interest, penalty and costs thereon; and the receipt of the county collector shall constitute an additional lien upon such land, to the amount therein stated; and the amount so paid and the interest thereon at the rate specified in the mortgage or other instrument shall be collectible with, or as a part of, and in the same manner as the amount secured by the original lien.
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(RSMo 1939 § 11163)