§ 472. Undertaking to be filed. If the property securing the
undertaking consists of real estate, the undertaking shall be filed with
the county clerk of the county in which the real estate is located and
the same shall constitute a lien upon the real estate specified in the
undertaking. The county clerk of each county is hereby directed to
accept such undertakings for filing and to provide proper and sufficient
books and indexes wherein the same shall be entered.