353 x 254 mm. (13 7/8 x 10 in.), some surface damage around edges from previous matting; matted. Signed and dated by Potter in pencil at lower left: "Helen Beatrix Potter 1878."" /> POTTER, BEATRIX. "The Three Witches of Birnam Wood." Original watercolor drawing. 1878. <I>353 x 254 mm. (13 7/8 x 10 in.), some surface damage around edges from previous matting; matted.</I> Signed and dated by Potter in pencil at lower left: "Helen Beatrix Potter 1878." | Christie's