while dancing, vassilissa waved her left sleeve and a pretty lake appeared in the midst of the hall and cooled the air. she waved her right sleeve and white swans swam on the water. the tsar, the guests, the servants, even the gray cat sitting in the corner, all were amazed and wondered at the beautiful vassilissa. her two sisters-in-law alone envied her. when their turn came to dance, they also waved their left sleeves as vassilissa had done, and, oh, wonder! they sprinkled wine all around. they waved their right sleeves, and instead of swans the bones flew in the face of the tsar father. the tsar grew very angry and bade them leave the palace. in the meantime ivan tsarevitch watched a moment to slip away unseen. he ran home, found the frogskin, and burned it in the fire.