NOTES: See "Doubts About the Finley Line." My brother Josh points out there is no substantial evidence disputing the Finley family's own recognition of James McGrew as the husband of Mary Finley (i.e., it is not the conventional situation of the less established line claiming a dubious but convenient kinship), so this site will resolve the issue that way unless and until more solid evidence calls that into question.
We know something of Sarah's genealogy because it traces maternally to the peerage (often the only way for a woman's ancestors to stay on the record), but not much else about her except that both she and her husband lived long lives. From somewhere else (I need to check) I have information connecting the Craigies with Dunblane, Perthshire, Scotland.