After such confirmation, and when the whole of the purchase money has been paid by the purchaser, or his heirs, or any other person holding under him, directly or derivatively, on the application of such purchaser, or his heirs, or such other person holding under him, or of the executor or administrator, the court must order a conveyance to be made to such purchaser, or to his heirs, or to such other person holding under him, as the case may be, by the executor or administrator, or such other person as the court may appoint, conveying all the right, title and interest which the decedent had, at the time of his death, in such lands; and such order shall operate to vest the right, title and interest of the decedent in such purchaser, or his heirs, or such other person holding under him.