6. What is engraved on the object Marguerite finds on the floor of the private rooms?

A small star-shaped flower is engraved on the ring Marguerite finds on the floor.

Marguerite turned it over in her fingers, and then studied the engraving on the shield. It represented a small star-shaped flower, of a shape she had seen so distinctly twice before: once at the opera, and once at Lord Grenville's ball.