It emphasizes Marguerite’s faith as the sustaining force of her survival, her grief at the deaths of those around her, and her eventual return to France.

What it does not do, crucially, is name Marguerite de la Rocque directly.

The woman in the tale is unnamed.

This has led to some discussion among historians about whether the tale is really based on Marguerite de la Rocque’s experience, but the circumstantial evidence is strong enough that the scholarly consensus is that yes, it is.

The details match.

The timing matches.