Hi Carrie Chaffee I can see why you are interested in finding out more about Herbert Fuller and Carrie C. Chaffee - with the same name! :) But I don't think you are in the same family branch. The names you mention don't show up in any of H.F.Chaffee's direct genealogy.
But Harry A. does show up in another branch.In Wm.Chaffee's 1909 CHAFFEE GENEALOGY, there is a Harry A. Chaffee, born 1883, in Ohio I think. That would make us about 14th cousins. Could that be the line you're looking for?
I am a descendant of H.F.Chaffee, and have been doing quite a bit of research on our tree, including descendants to the current generation of babies.Feel free to email me if I can be of any further help.