You may have this already, but it confirms the added info
The 1910 Census for English, Iowa County, Iowa
Merrit S, age 66, born in Ohio to both parents born in Virginia, US Post Master
Mary F, dau, age 33, born in Iowa, Teacher
Carrie S, 30, IA, Assistant Post Master
Maud E, 23, IA, no employment
Norvil (as transcribed, but was Norval) S, son age 18, IA., farmer
--also same page, up on census 2nd family.
Bentley B. Brown, age 39, married 13 years
Nan, wife, age 36, mother of 1, not living.
Your info does no answer a lot of questions. He (and son-in-law) signed a land deed for Iowa County. Who was buying the land, or were they selling it. If they were buying, they probably intended to return. If selling, all that document shows is that they were in Skamania County in 1912. There is nothing in the land deed to prove anything, that they lived there for any period of time, or why they were there.
You wrote he was living in the home of s-i-l and his wife AVO. Do you have information that Avo was there also?
I looked in the Washington Death Certificate index but found nothing on Merrit, or the McMillan's.
But, in your other postings there are some clues. It appears that David and Avo moved to Oregon, where they had children in Portland and lived in Lebanon. You obtained the obit for David L (the son) in July:http://boards.ancestry.com/localities.northam.usa.states.ore...
This obit indicates the son of David and Avo, had a wife and children. Are you in contact with them now? Ask the surviving wife, or even the children where Meritt might be buried. They are your best witnesses at this point.
Your search for Merrit begins in Portland with the surviving family. Then it goes back to Lebanon (Linn County) where David and Avo lived. It goes back again to Portland where David and Avo had their children.
In Lebanon and Portland, you need someone to look at the City Directories (Polks). A city directory is a book having the persons living in a populated area (city, county). It shows the persons in alphabetical order. It shows the spouse in parenthesis. If the spouse is also employed both are listed in the alphabetical order. If any other family members in the household are employed, they are shown. Some later directories showed children as "student". It shows their type of employment, sometimes where they worked. It shows their address. Later editions included a cross reference by address to show just the owner. This is helpful to find neighbors names. Later ones had phone numbers in order.
Begin looking at the directory for 1920 and go back in time in Portland to see when David and Avo first appear living there. That will put a time line back in time. If they were living there in 1913, then you have a short period of time back to the 1912 document. Also have them look for Merrit Brown. He just might show up there also.
Portland is in Clackamas, Multnomah and Washington Counties:
For a volunteer, first try rootsweb message boards for Portland, Oregon.http://boards.rootsweb.com/localities.northam.usa.states.ore...
The Random Acts of Genealogical Kindness has many volunteers. This page set for Washington County:http://www.raogk.org/oregon4.htm
Read the guidelines BEFORE you contact.
Where is Meritt? You may have information that isn't here or your other postings, but:
1. Died in Carson?
2. Moved to Oregon to be near Avo and David, or with them?
3. Returned to Iowa to be with the family there?
Norval Brown, son of Meritt, brother of Avo, was living in Portland in the 1920 census. He was living with Carrie, 41; and, Maud E, age 34. So, except for Mary, whose location is unknown, there might not have been family in Iowa by 1920.
--In the 1930 Census, Norval is living with David and Avo. Son, David L is 9.
I found your family tree posted online, now after looking for Norval. For others: he died 9 July 1955 in California. Avo also died in California.