This will take most of one day, but I believe you can find most of your answers by visiting the Allen County Public Library. They have records of many of the counties in the area. (This library is the second largest genealogy library in the country.)
The library parking garage is entered from the north side from Wayne Street and is under the library When you go in to the genealogy sections on the second floor, ask for a quick tour, and what you are looking for they are very helpful.
You may start your research at the genealogy web sitehttp://www.genealogycenter.org/
Or in the library "Card" cataloghttp://www.acpl.lib.in.us/
Your second best source would be to go to the court house in Portland, IN and check with the recorder of deeds. http://www.rootsweb.ancestry.com/~injay/