Notes:
1870: Freedom, La Salle, Illinois
Oswold Foster 29, b: Canada, farm laborer
Martha Foster 27, b: Canada
Ann Foster 9, b: Canada
Belle Foster 7, b: IL
Ella Foster 5, b: IL
Oswald Foster 2, b: IL
1880: Greene, Nodaway, Missouri
Oswald Foster 38, b: Canada/England/Ireland, farmer
Martha Foster 35, b: Canada/Scotland/Scotland
Annie Foster 18, b: IL/Canada/Canada
Belle Foster 17, b: IL/Canada/Canada
Ella Foster 14, b: IL/Canada/Canada
Oswald Foster 11, b: IL/Canada/Canada
1883 Washington State Census, Whitman County
Foster, O, 40, male, farmer, b: Canada
" , M, 38, female, b, Canada
" , E, 16, female, b: IL
" , Belle, 21, female, b: IL
Davies, J V, 37, male, stock raiser, b: England
1900 Census, MT, Teton Co., Marias twp., ED 137, dwelling 13
Davies, John V., head, June 1836, 62, m 20 yrs, b: England/England/England, 1st arrived USA 1870, stock raiser
" , Isabel, wife, Feb 1862, 38, m: 20 yrs, 6 children, 5 living, b: IL/Canada/Canada
" , Vernie, dau, Nov 1885, 14, b: WA/England/IL, at school
" , Lottie, dau, June 1891, 8, b: WA/England/IL, at school
" , Ernest, son, Aug 1893, 6, b: MT/England/IL, at school
" , Ethel, dau, Apr 1895, 5, b: MT/England/IL
Walburger, Conrad, servant, Sept 1880, 19 single, b. Germany/Germany/Germany, first arrived USA 1884, farm laborer
Monahan, Jas A, servant, Feb 1855. 45, widowed, b: IN/Ireland/Ireland, stock herder
Smith, George A, servant, Dec 1866, 33, married, 10 yrs. b: MO/TN/TN, stock herder
1910 Census, MT, Teton Co., Town of Conrad, ED 232, dwelling 182
Davies, Isabel, head, 47, widowed, b: IL/Canada/Canada
Francis, George F., roomer, 45, m1 16 yrs, b: MI/VT/Canada
24 May 1911 Montana, County Marriages, 1865-1950
Name: Isabell Foster Davies Or Davis
Gender: Female
Race: White
Marital Status: Divorced
Age: 58
Birth Date: 1864
Birth Place: Illinois
Marriage Date: 24 May 1911
Marriage Place: Great Falls, Cascade, Montana
Father: O. B. Foster
Mother: Martha Campbell
Spouse: Henry Pfeiffer
FHL Film Number: 1940165
8 Oct 1913 Montana, County Marriages, 1865-1950
Name: Isabell Phiffer [Isabell Foster]
Gender: Female
Race: White
Marital Status: Divorced
Age: 52
Birth Date: 1863
Birth Place: Ottowa, Ills.
Marriage Date: 8 Oct 1913
Marriage Place: Helena, Lewis and Clark, Montana
Father: John Foster
Mother: Martha Campbell
Spouse: James J. Goodburn
FHL Film Number: 1906501
1940: Oakland, Alameda, California
1234 E 18th Street
Residence in 1935: Same House
Thomas W White, head, 69, widowed, b: CA
Belle Davies, sister, 78, widow, b: IL
The California death index lists her birth as 2 Feb 1860 which I belive is wrong. She does not appear in the 1861 census of Canada