Hi Becky, I found Herbert and Jessie living in 1900 in Satsop, Mason Co. Herbert, b. Aug 1861, marr 2, b. IA, 38 yrs old, bookkeeper; Jessie, b. ___ 1875, marr 2, b. WA, 25, given birth to one child who was alive in 1900; Martha, b. Aug. 1899, WA, 9/12ths old.
Herbert and Jessie were living in 1910 in Olympia Ward 5, Thurston Co., WA. Herbert, b. IA, 41, marr 12 yrs, bookkeeper bank ____; Jessie, b. WA, 31, had given birth to 3 childen who were alive in 1910; Martha M., b. WA, 10; Mary J., b. WA, 8 and Georgia Helen, b. WA, 4.
In 1920 Herbert and Jessie were living in Shelton. Herbert C., b. IA, 58, merchant general store; Jessie L., b. WA, 44; clerk drygoods store; Martha M., b. WA, 20, single, stenographer ____ office; Mary J., b. WA, 18, single and Helen G., b. WA, 14.
In 1930 Herbert and Jessie were still living in Shelton. Herbert, b. IA, 68, marr @ 37, merchant mercantile store; Jessie, b. WA, 55, marr @ 22, saleslady mercantile store.
The 1930 Census is the most recent one viewable by the public at this time.
I searched for the other names you posted but didn't find anything. You'll need to find the girls married names. WA GenWeb, www.rootsweb.ancestry.com/~wamason/maston.htmhas a hypertext link to Mason County Lookup Volunteers who may have access to marriage records.
Another source is the Mason County Historical Society and Mason County Genealogical Society, www.rootsweb.ancestry.com/~wamason/mason.htm . Successful Searching!