Yolanda Sonnabend (1935 - 2015), Theatrical costume designs for two dancers, signed in pencil (lower right), pencil and watercolour, 38 x 28 cm, framed and glazed 59.5 x 48 cm; and costume design for two clowning figures, signed in pencil (lower right), mixed media, 39 x 28 cm, framed and glazed 59.5 x 48 cm