Mary Lou - I hope you have had better luck on this research than I have had, but I am still thinking about you as I am looking for my own Brinker ancestors. Yesterday I went through a bunch of 1850 information for Westmoreland County and the only Harriett I could find at that time (assuming they didn't miss her or that she wasn't living elsewhere at the time) was Harriet, age 14, the daughter of Jacob Brinker and Elizabeth. That family is in Unity Township. I wonder if perhaps you have someone who moved to Unity later than the 1850 - or, I guess it is also possible that the father is Jacob and not George. Anyway - I hope this helps some. I did check all the other townships in this source. It is a secondary source, but appears to be a good one on other accounts.