Bronze Female w/ marble 36H x 18 wide need ID

Need help with identification--any suggestions other than Christies or Sothebys???

Worth?

I live in Highland beach Florida and it was gifted to me from my Aunt about 10 years ago
She has now passed at 102!

i would like to know more about the markings

i know its bronze late 20's early 30's 36 H x 18 wide---- female i assume 2 /3 life size
dark green marble- almost black- supposedly it was one of tow end newel from a mansion