I am also descended from Adam. Your relation is through Adam's son, John, where mine is from his brother Stephen. I think. I'll have to double check this.
I also am looking to go further in my tree than Henry Shirk and Mary Catrie, but have been unable to find a link anywhere else. I just received an email from someone from the Schurch Family Association of North America. This website is wonderful. It's www.schurch.ca
. I will send you a copy of the email that they sent me regarding our lost Shirk relatives. Send me an email at email@example.com