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

Every person who purchases, at a sale for arrears 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 5 or section 6, and every person claiming any title to a monument form, through, or under, an owner who executed any such instrument shall be bound by such instrument.