I have always thought the secret on his birth certificate is the fact that his parents weren’t married and he was listed as illegitimate. Hardly would cause anyone to raise an eyebrow these days but back in the 60’s a young white girl giving birth to an illegitimate biracial baby would have been a scandal.
She would have loved nothing more. This was a counter culture, communist bent, America hater. An African baby and traveling the third world was her thumb in the eye of the country and mainstream culture.