The Logophile wrote...
I'll take that into consideration, but that's not what I meant when I asked for interpretation.
Oh.
Unto her, the sound’s origin had been revealed:
This makes me think the source of the sound has popped out at her. When it's revealed to be a fox, I imagine it walking out toward her from around a corner. I get the image of a fluffy, fiery fox that's crackling like a campfire.
Is that more in line with what you wanted?