In addition to that I've found Seth Mason Timberlake's listing at Find A Grave:
There is now a Timberlake Family Tree website which I've added to the list of other websites in the Bethel section: http://www.timberlakefamilytree.org
Because of these two things I found out how Charles Broadway Rouss was connected to my Timberlake family. I was always told the tale of how he courted my great-great-grandmother Aurelia Timberlake (later Heflybower) and how he came over drunk one time and she ended it. It turns out he was a brother to Seth M. Timberlake's 1st wife.
Also, I found the memorial to Cousin Keightley Wilson on Find A Grave and her listing on the Timberlake website. I was told about her and how my great-aunt Kitty was named for her. Here's her memorial: