The accident:
She had the blade and I the hide, and as she pulled the cutter-handle toward her, slicing through the leather so swift and smooth, I got excited and gave the hide a quick little tug, a fillip that sent the cutter through the end and oh! Her hand was caught and the world swung round and I tasted the bile of horror at what I’d done.
The reaction:
At first I cried far more than she—so much blood on the floor and the sight of Della’s finger lying there like some cave worm grubbed up from the depths. It shook my teeth a-rattle ***and no mistake***.
So her fingers are rattling: what does "and no mistake" mean here?
Thanks a lot for any hint you can give me :)
f