I agree with Jim's thoughts on this. With so many people being tested now it is much easier to figure out the parents of adoptees than it was say 5 years ago. However, Using autosomal DNA to figure out the parents of people born in the 1700s continues to be quite challenging. Triangulation is definitely where you need to go to solve genealogical problems in the 1700s. Tim Janzen -----Original Message----- From: GENEALOGY-DNA [mailto:[email protected]] On Behalf Of Jim Bartlett Sent: Thursday, October 5, 2017 12:20 PM To: [email protected] Subject: Re: [DNA] Difficulty understand Ancestry's shared matches I agree with Kitty and most of the Adoption researchers. Finding a birth families is best done through the closest Matches with Trees - found at any/all of the DNA companies. Triangulation is a very labor intensive effort now, and getting to the birth families seems to be much faster with mirror Trees and other methods as outlined by Kitty in her blog. As you get farther out - looking for a birth family beyond the grandparent level, I think the process of mirror Trees, etc. gets harder, and Triangulation may offer some advantages. Jim Bartlett [email protected]