Solve the Mystery!

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Across
  1. 1. First black Principal
  2. 2. A primary source
  3. 6. John's occupation
  4. 7. A time period
  5. 8. A history element
  6. 9. A skill of the historian
Down
  1. 1. This is done by historians
  2. 3. Not all information is this
  3. 4. Historians and detectives must have this
  4. 5. One of the school's location