Have you looked at any of Don Martini’s books? It looks from the Wikitree profiles that the Dawes cards and apps carry the line back at least three generations, and then refer to Martini. Some of his books can be accessed at LDS Family History libraries.
Sallie’s profile is Kemp-6954, Jackson’s is Kemp-597. This line goes back to a man named William Kemp in Wikitree.
If these are your ancestors it would help to build yourtree back to them.