The Little Mermaid, illustration from The Golden Wonder Book published 1934. She saw her sisters rise out of the sea, handing her a penknife with which they told her to kill the prince. PacificStock
But the little mermaid had no need to do this, for as the mere sight of the bright liquid, which sparkled in her hand like a shining star, they drew back in terror. Illustration by Edmund Dulac for The Mermaid. From Stories from Hans Andersen, published PacificStock