A wie Arsen, 1972 Ruth Wolf-Rehfeldt, A wie Arsen, 1972. Carbon copy; 21 × 29.5 cm. Ruth Wolf-Rehfeldt, “Signs of Signs”, exhibition view at ChertLüdde, 2018, Berlin, Photo: Trevor Lloyd Ruth Wolf-Rehfeldt, “Signs of Signs”, exhibition view at ChertLüdde, 2018, Berlin, Photo: Trevor Lloyd