In doing research for my Chapin post, I realized that I know the names and most of the dates for all sixteen of my third great-grandfather's second great-grandparents!
I am thankful for the availability of online primary sources for Massachusetts, which are plentiful. I find information at AmericanAncestors.org, Ancestry.com, and FamilySearch.org (enter Massachusetts in the Filter by collection name box). Where else have you found online records for Massachusetts?
The above fan chart for Orramel Chapin was created in Family Tree Maker 2 for Mac.