Mamie is not Jane. Mamie is her sister born May 22, 1882. Jane was born May 27, 1888 in Middlebury Vermont. Attached is her headstone from Kensico Cemetery, Valhalla, Westchester County, New York. Compliments of findagrave.com
I have attached a couple of photos of Jane in her movie actress days. I have found eleven siblings so far, but I believe there are several more. Some of her brothers moved to Essex County, New York, St Lawrence County, New York. I have found quite of few newspaper articles on her father. (www.nnyln.org)
Siblings:
William
Florence E
George
Edward Francis (Frank)
Mamie
Hattie D (Dorothy?)
Harriet Elizabeth
Julia M
Charles
Also found a male born 1895 which none of these siblings included in birth years. No name on Vermont Birth record.

Hope this helps.
Joyce