Hi Karen,
I originally received all my information from a long lost cousin in California, called Robert Sheldon Telford, His GG Grandmother is the same as mine. He issued a complete lineage on Rootsweb under the name of RS Telford database, but I am starting to question these records, because he said that Alexander McAdam came from the Waterhead family, but my further research says that there was only one surviving son, and that was John Loudon McAdam, son of James McAdam and Susanna Cochrane
Their children were, James, Jacobina,Gissel,Elizabeth,Catherine,Sarah,John Loudon and two children that died young.
I have two possibilities for Alexander which fits, #1 Alexander born in Dumfries 1756, and #2 which makes more sense, Alexander born in Brigham Cumberland, 1763 I hope this info' helps...................Larry