born April 1874–April 1875
in Smethwick, Staffordshire
died very roughly 1944
Surname taken from the only Ernest Portman marriage record in the right period (which also happens to have the expected bride's forename, and the right sort of location!).
1901 census: living at 39 Grove Lane with her husband and daughter. Her age is 26, and her place of birth is Smethwick.