I have placed some of my data on the descendants of Robert Seaver, the immigrant to Roxbury MA in 1634, on my genealogy.com web site:http://www.genealogy.com/users/s/e/a/Randy-Seaver/
There are Robert Seaver descendant four files there (and several are quite large - don't use a dialup modem for the big ones!) - one for each son of Robert Seaver and Elizabeth Ballard: Shubael, Caleb, Joshua and Nathaniel.
If you find errors in this data, or have data to add to it, please write me at firstname.lastname@example.org
and tell me.
If you have a Seaver/Sever mystery, please write me and let's discuss it. I have quite a few "loose Seavers" that don't have known parents yet, aspecially after 1800.
Regards -- Randy