These twins - Edward and Florence - had one sister Helen, who died when she was 11. However their parents are listed as William J Wall and Helen Whipple.
U S Census, 1910 Chicago Ward 35, Cook, IL
Citing this Record "United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MK8L-W4Z
SELF William J Wall M 45y IL
WIFE Helen M Wall F 36y KY
DAU Florence M Wall F 10y IL
SON Edward J Wall M 10y IL
DAU Helen M Wall F 8y IL
MOTH Mary E Wall F 65y Ire
Michigan, Marriages, 1868-1925
Source: https://familysearch.org/pal:/MM9.3.1/TH-267-12132-15580-99?cc=1452395&wc=M99B-CF8:1235581534
Edward J. Wall
Residence Chicago
Age 22 years Birth 1900 IL
Father Wm. J. Wall Mother Helen Whipple
Spouse Helen Carpenter
Residence Spring Lake
Age 20 years Birth 1902 Michigan
Father Chas. Carpenter Mother Edna Shaw
Marriage Date: 02 Sep 1922 Ottawa, Michigan
Illinois, Deaths and Stillbirths, 1916-1947
Citing this Record "Illinois, Deaths and Stillbirths, 1916-1947," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/NQQB-4BX
William J. Wall
Death 18 Apr 1926 Chicago, Cook, IL
Male Age: 62
Birth 20 Aug 1864 Chicago, IL
Father John Wall Birthplace: Canada
Mother Mary Nolan Birthplace: Ireland
Occupation: Salesman
Spouse Helen M. Wall
Burial Date: 20 Apr 1926
Cemetery: Mt. Carmel
Helen M. Wall
Death 26 May 1914 Chicago, Cook, IL
Female white
Age 11y 9m 28d
Birth Date: 28 Jul 1902 Chicago
Father Wm. Wall Birthplace: Chicago, Ill
Mother Helen Whipple Birthplace: Ohio
Occupation: School girl
Address: 175 No Lamon Ave.
Cemetery: Mt Carmel
Burial Date: 27 May 1914
