Judith, there is a young boy in the footage who I am fairly sure is one of the singers from the Voices Of East Harlem. They appear at the same concert and put in a very good performance too. Not wishing to take anything away from Mavis - she is a very engaging performer/ person.
Nikki - the young boy with the radiant smile? Hard to forget a beautiful face such as his. Thank you for your information. I hadn't known much of anything about the Soul to Soul Concert (Ghana, 1971), so I wikipedia'd it For those who may also be interested: