But Denig knew the songs existed.

He knew because he had been at Fort Union for twelve years, and the Crow who traded there sometimes sang.

He knew because he asked questions and listened to answers.

He knew because the evidence of her fame — the multiple accounts, the high rank, the widespread reputation — all pointed to the kind of sustained public recognition that songs represent.

In the end, the songs are the most important thing about her story.

Not because they preserved specific facts, but because they tell us what her own community thought of her.