signed, erroneously numbered, inscribed and dated 'Louise A Lawler 1/5 1990 PART A OF A TRIPTYCH' on the reverse of part A signed, numbered, inscribed and dated 'Louise A Lawler 2/5 1990 PART B OF A TRIPTYCH' on the reverse of part B signed, numbered and dated 'Louise A. Lawler 2/5 1990' on the reverse of part C