I've had good luck researching my genealogy over the past few years - with one exception...my paternal great grandmother. The best clue I have is the marriage license for my grandfather on which it states his mother was "Catherine Merryman" who was born in Maryland. His father (my great grandfather), who is also on the license, was apparently never married to this woman. In fact I see where he was married for the first time some 8 years after the birth of my grandfather. There are a few Catherine Merrymans in Maryland in the time period of my grandfather's birth (1895) but nothing clearcut. To add to the mystery, I just got my 23andMe ancestry results back and wouldn't you know it, a George Merryman shows up as a potential 3rd cousin. He and I have communicated but have been unable to find the link in our trees that would shed more light on who exactly Catherine Merryman was.