It's interesting that your list of Hugh's children corresponds to a list of my ancester's children.But my ancester was supposedly a John Fergus (b1717) who emigrated I don't know when through Baltimore and settled in Mt Joy Township.His children were supposedly John, Nancy, Thomas and Samuel.Your list includes three siblings that I have not seen before for John, so there are a couple of possibilities. 1.Your Hugh really only had three children; Hugh, Mary, and Robert, and the other four were John's. 2.My data is inaccurate and my ancester through Samuel Fergus is really Hugh, not John.This is possible if my relative who did the research 25 years ago, and wanted to join DAR got confused or just plain stretched it since she had the documentation for John being involved in Rev War, but her and my ancester was Samuel who was born to Hugh... It is interesting that the data you have has birthdates for the four siblings that I thought were born to John and do not have birthdates for the three that I had not heard of before; although Hugh, Mary and Robert are all traditional names in my family tree.
I think we may be onto something here.Please ask Cynthia Russell if she has ever tried to piece together a complete Fergus picture of the 1700's and 1800's.I am still confused by the different trees I see on this site.It would be good to make some sense of them in one coherent whole. They must trace back to a Fergus family in Scotland that split through Ireland, but came together again in Pennsylvania.