Under section 7 of the Land Improvement Loans Act loans are recoverable by the Collector in all or any of the following modes, namely: (a) from the borrower as if they were arrears of land revenue due by him; (b). . (c) out of the land for the benefit of which the loan has been granted as if they were arrears of land revenue due in respect of that land; The proviso to section 7 reads "Provided that no proceeding in respect of any land under clause (c) shall affect any interest in that land which existed before the date of the order granting the loan, other than the interest of the borrower, and of mortgagees of, or persons having charges on, that interest, and where the loan is granted under Section 4 with the consent of another persons, the interest of that person, and of mortgagees of, or persons having charges on, that interest.