Hi Misty13
I don't know if I have been in touch with you long ago on this, so excuse me if anything is a duplication. Thirza England of Red Deer (born Winterbourne Stoke, Wiltshire UK) was my great grandfather Thomas Grant's sister.
Her children included Frank Herbert England b 1895 Queensland (Canadian Infantryman) who died 9 Sept 1916 WW1 France, and Victoria May England b 1897 Queensland, both in the family you are researching. My research into Red Deer documents suggests that May's brother Frank's death in WW1 could have been an unfortunate but timely episode, which enabled Thirza to pass off her 15 year old daughter's son by Ross Piper as Frank's, and thereby remove any social stigma from May.
The early records concerning Thirza however, are often incorrectly quoted, because Thirza's mother (Ann Petty) remarried soon after her birth. So in her youth, Thirza was often recorded under her stepfather's surname of Mitchell.
I have a great deal on the Grant/Mitchell/England/Sylvester family (all names Thirza had) and can also add the names of the two/three husbands May had after she gave up her son. So if there is anything I can help you with, please let me know.
Roy G