I think I've some information for you, at least to ponder and further research.I do not speculate that some disaster came to a family simply because they aren't found... initially.I also don't speculate that females simply disappeared because they married.
For this search, I first visited the image of the 1910 census for more clues:
The 1910 Census for Frankfort, Pacific County, WA
Ivah Hansen, head, age 53 (circa 1857), born in Finland, immigrated in 1889, married 15 years, laborer/fishing (industry?).Renting.
Hilda, 42 (circa 1868), born in Finland, mother of 7/all living.
All children born in WA.
Age/birth years dependent on the given info and the enumerators transcription.Enumeration was on 15 April 1910, so all children's ages could be based on being born between 16 April 1909 and 15 April 1910.
Virginia H, 14 (born circa 1895/1896)
Hilda H, 12 (1897/1898)
Carl G, 11 (1898/1899)
Emma E, 9 (1900/1901)
Albert H, 8 (1901/1902)
Oscar R, 5 (1904/1905)
Lewis L, 2(1907/1908)
Note:When I first saw this census image, the handwriting did not look like "Ivah".I thought it was "Isah" or "Isak".My thought was later returned when I found the death information on an Isaac Hansen in 1928 (Below).The daughter's name initially appeared as "Hulda", but the mother's name was Hilda.Second, if you look at the above name, the "g" in Virginia goes down into the next line enough so that the enumerator had to separate the "i" in Hilda and the "l" enough to compensate for the above "g".
Frankfort is a small community on the west side of Grays Bay on the Columbia River east of Knappton in southwest Pacific County. It was founded by Frank Bourn and Frank Scott in 1890 when they arrived on Gray's Bay. They found the place to be a "...likely spot to start a city, a river metropolis protected from the fierce winter storms by a prominent headland." Larry Weathers writes that it flourished from 1890-1893 with a post office, hotel, local newspaper and a saloon. The town site was sold at auction to a logging company January 14, 1953. (Florin, Washington Ghost Towns. p. 27)
Add'l (sorry about the music) http://www.ghosttowns.com/states/wa/frankfort.htmlhttp://www.ghosttowns.com/states/wa/frankfort.html
Hilda Hansen Cemetery
Information gathered and transcribed this 5th day of August, 2002 by T Sheldon.
Location:SE 1/4 of the SE 1/4 Sec 36, T10N, R9W
The two acres that were donated for this cemetery were offered to the public by Hilda Hansen, though I have no dates for this transaction.Her land sat near a large logging camp of the day, Brix Camp.There is a slight possibility that there may have been a burial here on this land, but none are known as of this time.
The 1910 Census for Naselle, Pacific County, WA
(Just above the names is identified: "Bricks Logging Camp".
Oscar Hansen, age 14, born in "Wash" to both parents born in Finland, logger
--It is "possible" the "Bricks Logging Camp" was the "Brix" identified in the cemetery land given by Hilda Hansen.
The World War I Draft Registration Card Image Database:
Carl Gustof Hansen, born Sep 15, 1898, living in "Onida", his nearest relative is Hilda Hansen.Nothing to identify if this was mother or sister.
For the 1920 Census, I looked for ANY Virginia, Hilda or Emma, born plus/minus 2 years of their birth year, father born in Finland or mother born in Finland.
--In Ilwaco, Pacific Co.
Hulda Broughton, age 24 (1895/1896), born WA, to both parents born in Finland.,
Clarence Broughton, age 28, born in Georgia to father born in South Carolina, mother in Georgia, fisherman.
Barbara, 4 8/12, census enumerated 31 January, so born about April 1915
Seola, dau, 2 8/12, born about April 1917
**Washington Birth Index shows this Hulda was Hulda Pitman
--In South Bend, Pacific Co. Enumerated 7-9 Feb.
Edgar Church, age 23, born in Washington to father born in WA, mother in Oregon, logger/logging camp
Hulda, 22, born in WA to both parents born in Finland
Iclie? dau 3 10/12, WA, born about March 1916
Edgar, son, 2 5/12, WA, born about August 1917
***WA Birth Index shows this Hulda to be Hulda LAMPE
This Isaac did come from Finland, "about" the right age, is married to a Hilda; and, Albert Hansen is the informant.There is NO PROOF this is the correct person, but the closeness to the search criteria is enough to further research.
HANSEN, ISAAC -- Born March 13, 1856, Tornio, Finland. Died June 11, 1928, Oneida, Wash. Cause of death: myocarditis; chronic nephritis. Husband of Hilda. Farmer. Father: Hanu Rokovara. Informant: Albert Hansen, Oneida, Wash. Burial June 14, 1928, Seal River, Wash.
--This Fred is on the same page of the 1910 Census as "Ivah"
HANSEN, FRED -- Born February 10, 1851, Finland. Died Jan. 15, 1930, Frankfort, Wash. Cause of death: stomach cancer. Husband of Florence Smalley. Father: Samuel Jokela. Burial Jan. 18, 1930, Seal River, Wash.
NOTE: Oneida is in Wahkiakum County.Seal River is a cemetery in that county.I looked for an online transcription of the Seal River cemetery, but without success.Few cemeteries are actually transcribed.
Seal River location: http://naselle.net/sealriver/http://naselle.net/sealriver/
Usually I'd suggest going to the above site, finding someone whose stone was photographed and then contact that person if they live in the area.BUT, I didn't see any that were photographed.
Why isn't "Ivah" or "Isaac" listed in the census?Many possible reasons, the enumerator didn't find them, the notes used for transcription to the census forms OR the census forms were lost, the census page was lost or unreadible.Usually, I find when someone lives in an area for a period of years, in this case at least two census period, they simply lived in an area where the enumerator failed to find them.
Washington Death Index:
Oscar R. Hansen, died 29 July 1977 in Pacific County, born about 1905.
Washington Death Certificate Index
--Isaac Hansen, died 11 June 1928 in Onieda, Pacific Co, WA, age 71 years, married to Hilda.His father was Hann Rokovara.
--Hilda Kristine Hansen, died 7 August 1937 in Deep River, Pacific Co, WA, age 71 years, 2 months, 20 days.Married to Isaac Hansen, father Olaf Olson.
Obituaries in Washington:
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 .
Your leads.First attempt to get the obituaries on Isaac and Hilda Hansen via the Washington State Library.Obits were not as popular then as today.PLUS, they lived in a remote area.They probably would not have purchased an obituary from a newspaper many miles away.Anyone in the local area would have known they died and knew of the family.Most remote living farmers did not have obituaries... BUT, request them, separately.Also obtain Oscar's.
The Seal River Cemetery:Judy, a volunteer on the Random Acts of Genealogical Kindness takes photographs there:
http://www.raogk.org/washingt4.htmhttp://www.raogk.org/washingt4.htmRead the guidelines first.Judy might find other "Hansen" buried here.Give her complete information
The Hilda Hansen Cemetery: There are four volunteers in Pacific County.You can "eventually" ask Junel for Marriage license info.Lonna might be able to research the land donation by Hilda, she lives to far for any search of the land.Emily is the same.It amazes me when someone says the distance is too far.This is Washington State.Sounds like something someone says on the east coast when they find the grocery store is 5 miles away.
'bout all I kin do fur now'