1. Prize sale accounts in F.O. 84/345, 449, 506.
2. For a full analysis see the unpublished doctoral dissertation for Boston University by Dr Arthur Porter of the University College of Sierra Leone.
3. References to property sales in Sierra Leone are from the records of the Court of Recorder in the Registrar-General's Office, Freetown.
4. There is a memoir of Johnson in Sierra Leone Weekly News, 10.6.99.
5. The African, 24.5.57.