Each child in a particular family is numbered in order of birth. When he is listed in his own generation, he is given a number showing his family line. 1- is the first child of the oldest known ancestor. 1-3 is the third child of the first child of the oldest known ancestor. References are noted by Ref and a number.
All references refer to a common reference pool.
The reference page will be at the end of the family outline. John Davidson is our oldest known Davidson ancestor. I have gotten this from at least two sources. Tom Walters, another descendant, stated that John Davidson came to U.S. in 1740 from Ulster, N. Ireland via the Port of Philadelphia. He also stated that he was 65 and came with wife Jane and son Samuel and family.