Who was Nancy Tilly?

[bob_summers]

In an interview Mrs. Mudd gave a couple of years before she died, she said:

"There was no one in our home that night except the Doctor, myself, the children and the children’s nurse, a white girl named Nancy Tilly." See https://www.muddresearch.com/mrs-samuel-...rview.html

I've never been able to find anything in census, etc. on a girl or young woman by that name living in Maryland around 1865. Or Tally, Tully, Twilly, etc. Nobody by that name was interviewed by the military after the assassination.

Has anyone ever heard of this Nancy Tilly?