The diaries of Sir Roger Casement, who was executed for high treason in 1916.
The Casement Diaries consist of three private diaries, a note book and a ledger. The diaries relate to Casement's time as consul in the Congo and in Rio de Janeiro, as well as some time spent in the United Kingdom and France. The diary entries are not continuous; there are large gaps between some entries. The diaries include observations on the people and conditions that he encountered in his investigations into the mistreatment of indigenous peoples in the Congo and in the Putumayo rubber industry in Peru.
Following his arrest in Ireland in 1916, the diaries were brought into New Scotland Yard from Casement's former London lodgings by a Mr Germain. They were not used in evidence at his trial, but were shown to various persons, including the American Ambassador, as evidence of Casement's homosexual activities, in order to blacken his character and counter the campaign for a reprieve from his death sentence.