text:  They are all registered in the treasury; but the foundation is invalidated if the property assigned for its support be encumbered by mortgages or other obligations:--nor can any one labouring under an incurable disease convert freehold property into wakoof except as a testator in which case the inalienable rights of the heirs to two-thirds of the property are secured:--a third part only according to law being otherwise disposable by will