references
photo sources:
1. https://aiatsis.gov.au/archive_digitised_collections/dayofmourning/background.html (source 2)
2. https://en.wikipedia.org/wiki/William_Cooper_(Aboriginal_Australian) (source 1)
3. http://explore.moadoph.gov.au/people/william-cooper (source 3)
4. http://explore.moadoph.gov.au/people/william-ferguson (source 4)
information sources:
5. https://en.wikipedia.org/wiki/William_Cooper_(Aboriginal_Australian)#Legacy
6. https://en.wikipedia.org/wiki/William_Cooper_(Aboriginal_Australian)#Family
7. http://www.abc.net.au/news/2010-05-03/hand-in-hand-book-explores-jewish-and-aboriginal/419538
