Send Carl Griffith's friends an SASE, and they'll send you some sourdough starter that's been active since Carl's great-great-grandfather was active.
All I know is that it started west in 1847 from Missouri. I would guess with the family of Dr. John Savage as one of his daughters (my great grandmother) was the cook. It came on west and settled near Salem Or. Doc. Savage’s daughter met and married my great grand father on the trail and they had 10 children. It was passed on to me though my parents when they passed away. I am 76 years old so that was some time ago. [Link, via Boing Boing]Carl has since passed on, but his friends continue to distribute the starter for the price of postage.