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This database uses mtDNA results to test the strength of the paper trail to show where to focus our investigations. The downside is (vs autosomal) that you can only test (at least) two lines, but anything is better than nothing. And with mtDNA you can test 100s of generations back (we don't have that data yet!)!
The work is done here:
(You need to open the document with google sheet to view the pivot tables)