law: 12. Power to inquire into consideration for leases, etc.-
  The Manager may inquire into the sufficiency of the consideration for which any lease, settlement, grant, mortgage, charge or lien was given and whether it was given in contravention of the conditions of the Murshidabad Act, 1891 (15 of 1891), and if satisfied that the consideration was insufficient or that such lease, settlement, grant, mortgage, charge or lien was given in contravention of the said Act may, by order in writing, set a side or modify such lease, settlement, grant, mortgage, charge or lien; and any such order, subject to the appeal provided in section 13, shall have the force of a decree of a competent Civil Court and be enforceable as such.