Purchasers at certain sales and persons claiming through owner bound by instrument executed by owner

Every person who purchases at a sale for arrear of land revenue or any other public demand any land on which is situated a monument in respect of which any instrument has been executed by the owner for the time being, under section 4 or section 5 and every person claiming any right, title or interest to or in a monument from, through or under, an owner who executed any such instrument, shall be bound by such instrument.