How does the author use foreshadowing in Uncle Tom's Cabin?

In a conversation with Uncle Tom, the author hints (foreshadows) at Eva's death.

“Uncle Tom,” said Eva, “I’m going there.”

“Where, Miss Eva?”

The child rose, and pointed her little hand to the sky; the glow of evening lit her golden hair and flushed cheek with a kind of unearthly radiance, and her eyes were bent earnestly on the skies.

“I’m going there,” she said, “to the spirits bright, Tom; I’m going, before long.”