You may have the below census information, but I didn't and needed the information for the research.
The 1900 Census for District 2, Boise Ward 2, Ada Co, Idaho. Census enumerated 18 June.
John E. Carter, born Dec 1865 in Iowa to father born in Indian, mother in Maryland, Feed Coral(as spelled, Corral?) Keeper.Married 3 years. (1896/1897),
Laura, born April 1873 in Kansas to father born in England, mother in Canada
Ralph, born Dec 1897 in Idaho.
shows they were married in Ada County on 7 October 1896, Volumne 4, Page 82.He was living in Nampa, Canyon County.She was living in Highland Valley.
The 1910 Census for District 70, Vancouver Ward 6, Clark Co, WA, living East of the Garrison Road, census enumerated 18th day of April.
John E. carter, age 44, born in Iowa, merchant/grocery store/employee, first marriage for 13 years.
Laura, age 36, born in Kansas, mother of 3, all living.
Ralph, age 12, born in Idaho
Alta, age 9, born in Idaho
Claud (as spelled), age 4/12, born in Washington.
--The census was enumerated on 4/18/1910, so Claude was born late December 1909/early January 1910.
--Alta not showing in 1900(June), was 9 in this census.So, she would have been born after June 1900 and before April 18 1901.
The 1920 Census for District 39, Vancouver, Clark County, WA, enumerated on 7 February.Renting on East 10th Street.
John E. Carter, 53, Iowa, truckdriver/general
Laura A, 46, Kansas, storekeeper/grocery
Ralph 22, Idaho, Not employed
Alta L, 19, Idaho, filing clerk/shipyard
Claude H. 10.
The 1930 Census for District 23, Hazel Dell, Clark County, WA, owning on Anderson Road, enumerated April 14 & 15.
John E Carter, age 65, Iowa, owner/auto X(scunp?)
Laura, 57, Kansas
Harold 20, WA
The 1930 Census for Vancouver, Clark County, WA, enumerated April 12. Renting at 406 West 32nd Street, $40.00 a month
Ralph Carter, age 32, born in Idaho to father born in Iowa, mother in Kansas, Dentist/General practice, first married at age 25.
Nell, age 31, born in Canada to both parents born in Canada, first married age 24.
Doris, age 1 6/12, Washington
--based on enumeration date, born about Oct 1928.
--www.zabasearch.com, a website that uses public information data, shows a Doris C. Keller, born 1928 in Vancouver, WA.The Clark County Auditor for Recorded Documents is down at this time. I can check tomorrow.
The 1930 Census for District 43, Vancouver, Clark Co, WA, enumerated 4/7.
Geo Fernan (as transcribed), age 41 (if accurate, 1888/89(, born in Wisconsin to father born in ?, France?, mother in Switzerland.First married age 21
Alta, age 29, born in Idaho to father born in Iowa, mother in Kansas, first married age 28.
The Washington Archives: http://www.digitalarchives.wa.gov/default.aspxhttp://www.digitalarchives.wa.gov/default.aspx
has an image of the marriage of Alta Carter and George J. Fernea on 10 October 1928, at Vancouver, in Clark County.In the presence of Ruth Claassen, Ernest B. Farn/Farm....Phin G Baskerville?
--an image of a marriage record of Marilyn J. Fernea to Delbert I Mosier, June 28, 1958 in Clark Co., at St. Luke's Episcopal Church.Both were of Clark County.Delbert L Mosier was born Mary 11, 1933, Marilyn Jeanne Fernan, born March 18, 1935.Witnesses, S. Eileen Kusache, Lyman W. Mosier.
----www.zabasearch.com shows Marilyn Mosier in Portland, OR
---Lyman Mosier, 25 Sep 1930, died 28 Oct 2005 in Vancouver, Clark Co, WA.
The Washington Death Certificate Index:
--George Jacob Fernea died 12 June 1947, at age 59 years 7 months 21 days, in Vancouver, Clark Co, WA.His spouse was Alta Fernea, father John E. Fernea, mother Katherine King.Date of birth based on age at death, 22 November 1887.
The Social Security Death Index:
Claude Carter, born 4 Nov 1909, died 12 Feb 1997 in Salem, Polk Co, OR.While his month of birth is a bit earlier than the "guesses" made from the census, this person is a possibility.
From: http://www.rootsweb.ancestry.com/~waclacem/ParkHill/ph_c.pdfhttp://www.rootsweb.ancestry.com/~waclacem/ParkHill/ph_c.pdf, page 18
EA 20, Ralph E. Carter, 1897-1962 (Dr. Ralph E. Carter, b: ID, d: 26 July 1962, age 64 yrs 7 mos of heart.lot owner: husband, fd: Knapp.
--The important info here is his date of death.You probably have it, if not get his obituary if you don't have that.It would show where his children were when he died.
For those dates of death above, and those that you have, obtain their obituaries if you haven't:
The Washington State Library has a free research service, the ask-a-librarian program, where they will look for information in the archives, in this case the newspaper microfilm for an event, such as an obituary.They will look up to an hour and send you the results.Contact them at: http://www.secstate.wa.gov/library/ask.aspxhttp://www.secstate.wa.gov/library/ask.aspx .Depending on the amount of requests, it could take up to a couple of weeks.
If you have any additional information on the children, post it.It is late, so that's all I'll do at this time.