Robert Todd Lincoln --The vitals

[ScholarInTraining]

I can definitely see RTL's resemblance to his father in the eyes, ears, nose, and hairline. Especially those rare portraits taken of him where he appears more "natural" - messier hair, chin stubble, etc. I think historians have liked to exaggerated his physical differences to his father as much as possible, to emphasize their supposedly "not close" relationship.
However, less than his parents, I think he may have looked like someone else....like an ancestor of the Lincolns or Todds. He appears to have had some Native American-esque elements about him. (From Lincoln's mother Nancy?)

Sorry to bump an old-ish thread, but it's interesting!