Every holder of a certificate of purchase shall before being entitled to apply for deed to any tract or lot of land described therein pay all taxes that have accrued thereon since the issuance of said certificate, or any prior taxes that may remain due and unpaid on said property, and the lien for which was not foreclosed by sale under which such holder makes demand for deed, and any purchaser that shall suffer a subsequent tax to become delinquent and a subsequent certificate of purchase to issue on the same property included in his certificate, such first purchaser shall forfeit his rights of priority thereunder to the subsequent purchaser, and such subsequent purchaser shall at the time of obtaining his certificate redeem said first certificate of purchase outstanding by depositing with the county collector the amount of said first certificate with interest thereon to the date of said redemption and the amount so paid in redemption shall become a part of said subsequent certificate of purchase and draw interest at the rate specified in said first certificate but not to exceed ten percent per annum from the date of payment. Said holder of a certificate of purchase permitting a subsequent certificate to issue on the same property, shall, on notice from the county collector, surrender said certificate of purchase on payment to him of the redemption money paid by the subsequent purchaser.

(RSMo 1939 § 11152)