Mary baby-sat the black baby in January 1961 for Anna Obama, whose name appeared in the Seattle Polk for 1961-1962.
Susan Blake saw the pink baby when Stanley Ann Dunham came to visit and tell her she was married to the kenyan student. And then she took off, and Susan never saw again.
Mary babysat Barack Hussein Obama 11, the child the kenyan student (or Ruth) took to Kenya in the Fall of 1964.