Harry, it sounds like we may be cousins. as I am descended from those Benjamin Daltons. I have a public tree on Ancestry. This is the Benjamin "Jr" you were talking about.

http://www.findagrave.com/cgi-bin/fg.cgi?
\page=gr&GSln=dalton&GSfn=benjamin&GSmn=f&GSbyrel=all&GSdyrel=all&GSst=48&GScntry=4&GSob=n&GRid=114359086&df=all&

I am descended from his brother Doctor Lynch. You may know more than me, but I don't know if he qualifies as a Jr or not. His middle initial is F, and I don't know whether or not his father shared it.