amount of the mortgage debt

Marcia executed a mortgage of Black acre to secure her indebtedness to Ajax Savings and Loan Association in the amount of $125,000. Later, Marcia sold Black acre to Morton. The deed contained the following provision: “This deed is subject to the mortgage executed by the Grantor herein to Ajax Savings and Loan Association.”
The sale price of Black acre to Morton was $150,000. Morton paid $25,000 in cash, deducting the $125,000 mortgage debt from the purchase price. On default in the payment of the mortgage debt, Ajax brings an action against Marcia and Morton to recover a judgment for the amount of the mortgage debt and to foreclose the mortgage. Can Ajax recover from Marcia and Morton? Explain.