Roger Casement

In the 1880s the Ulster Protestant Roger Casement worked as one of HM Stanley's volunteers in the Congo, before joining the British consular service.

In 1904 he produced a devastating report which showed how the Congo Free State, far from being the model colony Leopold II of Belgium claimed it to be, was a ruthless commercial enterprise run with unrelenting cruelty for Leopold's profit.

Six years later he provided an even more horrifying report on how Amazonian Indians were exploited by the Peruvian Amazon company, a British-based rubber company.

For this he was knighted in 1911. An Irish nationalist, when war broke out in 1914 he went to Germany to secure a treaty giving Ireland formal recognition of her nationhood.

Upon returning in a u-boat to Ireland in 1916 he was captured, brought to London and sentenced to death as a traitor.

To blacken his name further, rumours about his "black" diaries claimed that he was a practising homosexual.

The author Brian Inglis was allowed access to the relevant files at the Public Record Office in order to help research this biography.