Based on Emily's birthdate, we can look for both McFarlands and Rackliffs in Bristol prior to 1826 via birth, marriage, cemetery records; etc...
Also, four of Walter McFarland's children settled in the North Auburn/Turner/Lewiston area of Maine in their adult lives. Two of Walter's daughters married 'Davis' men. I believe they were a close-knit family as Luella McFarland-Davis named two of her sons after her brothers "Allouie & Ernest".
Where did your Rackliffs (Radcliff) move to after Detroit, ME?