Sir James Colvile, who delivered the judgment of the Board, referred to the case of Kantoo La (1) and observed that " this case then, which is a decision of this tribunal, is undoubtedly an authority for these propositions: 1st that where joint ancestral property has passed out of a joint family, either under a conveyance executed by a father in consideration of an antecedent debt, or in order to raise money to pay off an antecedent debt, or under a sale in execution of a decree for the father 's debt, his sons, by reason of their duty to pay their father 's debts, cannot recover that property, unless they show that the debts were contracted for immoral purposes, and that the purchasers had notice that they were so contracted; and 2ndly, that the purchasers at an execution sale, being strangers to the suit, if they have not notice that the debts were so contracted, are not bound to make inquiry beyond what appears on the face of the proceedings ".