Witness (though not called to Elizabeth Stride's inquest).
From the Evening News article:
Gardner corroborated all that Best said respecting the conduct of the man and the woman at the Bricklayers' Arms, adding "before I got into the mortuary to-day (Sunday), I told you the woman had a flower in her jacket, and that she had a short jacket. Well, I have been to the mortuary and there she was with the dahlias on her right side of her jacket.
I COULD SWEAR
She is the woman I saw at the Brickayers' Arms and she has the same smile on her face now that she had then.
For more detail regarding the sighting, see J. Best.
- Evening News, 1st October 1888