I tried to send an email directly to you but had no success. The following information was contained in my attempted message.
The one person that is best informed on the entire family that you are researching is Cathea Curry. Cathea descends from this same line and has done extensive research over a long period of time. Cathea's email address is:CatheaC@aol.com
By the way, Cathea can provide you with proof of the maiden name (Holt) for Elizabeth's mother, Dorcas. Cathea also has a copy of Barton's estate settlement in Martin County, IN. After the death of Wm. Barton, Dorcas remarried. Dorcas and her new husband also moved to Edgar County, IL.
In addition, Cathea has an entire list of Elizabeth's siblings and their marriages. Most were married in Martin County (1 male, five females) but two of the younger sisters were married after the families arrival in Illinois. One sister, Hannah, never married.
Would appreciate learning if you can contact Cathea and news of any success.