I was only following my own line of descent, when I did that, and the only Abigail Adams in my line was born in 1774 and married George Ford, however...I think it likely that you would be connected to Christopher and his descendants considering the location and their large families. My Christopher Adams tree (I think Tigger2 or something like is my posting ID there, so you will know which is mine) is posted out at Ancestry.com and you might browse through to see if you have any connections with any of the family names/dates which might lead you down to your Abigail? Sorry. I know your frustrations. It took me the better part of a year's research to pull mine together and that was spending 20+ hours per week at the task!