And even furthermore, something I realized I left out --
So Mehitable Rowley (married to John Fuller) is also the sister of both Moses Rowley Jr. and Shubael Rowley. The parents of Mehitable, Moses Jr, and Shubael are Moses Rowley Sr. and Elizabeth Fuller.
Mehitabel and John Fuller had a son named Edward Fuller. Edward Fuller married the daughter of Mehitable's brother Shubael (she is the third Elizabeth Fuller).
So there you have first cousins getting married. Fun :-)