A Gong to the Past is based on a little gem of a historical snippet I heard last year about a place in Ghana called Labadi. Apparently Labadi was so named because the locals' sabotaged plans to build a slave fort on their land during the Triangular Trade.
However, whilst the bit about the slave fort is based on fact, everything else weaved around it in the story is completely made up.
I do remain fascinated by the history of Labadi, and will continue to dig. I have not read any reference to the slave fort sabotage anywhere. If any readers know more, do please share.