Here's a very moving short clip I found on YouTube. It's called "Old Black America," and it's a compilation of head and body shots taken in the late 1800's and early 1900's.
I've seen most of these pictures before. You can access them -- and many more -- at the Library of Congress - http://loc.gov.
Originally posted at https://www .youtube.com/ watch?v=dD5M_n3aV6g