6. In chapter 9, when the walls of the elevator become a bulletin board, Grace Wexler advertises the following items as lost, a silver cross on filigree, topaz pin and earrings, and gold-filled cuff links. But we know that she didn't lose the silver cross

Chapter Five:

Slumped in the third chair Turtle pretended she had never seen this paneled library with its bare and dusty shelves. Suddenly she sat up with a start. An open coffin draped in bunting rested on a raised platform at the far corner of the room; in it lay the dead man, looking exactly as she had found him, except now he was dressed in the costume of Uncle Sam—including the tall hat. Between the waxy hands, folded across his chest, lay her mother’s silver cross.

Grace Wexler was too busy greeting the next heir to notice.