The ancestry of the Hargadine lineage covered in this book span from the mid-1700s in Maryland to modern day across all of North America. Sam Hargadine has used every kind of record available, from family Bibles, court documents, birth and death records, to church rolls and grave records, and including newspaper reports and oral histories. At some point in his thirty-plus endeavor, the Internet became a viable and mostly reliable source of information. Data retrieval has been changing throughout the time this information was gathered, and doubtless will continue to be a challenge, and we can feel fortunate that people like Sam Hargadine and those whose passion for family lineage drive them to seek out the knowledge that exists, and write it all down for our easy access!