There doesn't appear to be an author named Fanny Hillman. You might be thinking of Fanny Hill, the protagonist of the 18th-century erotic novel "
Fanny Hill: or, Memoirs of a Woman of Pleasure." This novel was written by
John Cleland under the pseudonym
"Fanny Hill."
It's possible you're thinking of a different author, or that you've misremembered the name. If you could provide any more information about the author or the work you're looking for, I might be able to help.