Letter from Sir Roger Casement (1864-1916) to George Gavan Duffy (1882-1951).Casement urges Gavan Duffy to recover, from the High Court of Justice or the Home Office, documents and papers contained in a canvas portfolio that he had brought from Brixton Prison to give to him (Gavan Duffy). The portfolio contained documents dealing with Casement's trial, and Casement was eager for them to be read only by Gavan Duffy. Casement also writes that he has ‘been 'wrongfully and most untruthfully assailed' in the course of proceedings by the crown witness. He goes on to thank Gavan Duffy and his other supporters, and requests that his correspondence be copied and passed to friends.Sir Roger Casement was a humanitarian and Irish Nationalist. Casement believed that an Irish insurrection would be crushed unless it received substantial assistance from Germany, and when it became clear that adequate help would not be forthcoming he travelled to Ireland by submarine. Casement landed and was arrested at Banna Strand, County Kerry on Good Friday 1916. He was tried in the Old Bailey for treason and subsequently executed by hanging at Pentonville Prison on 3 August 1916. George Gavan Duffy was an Irish politician, barrister and judge. He unsuccessfully defended Roger Casement at his trial for high treason after the Easter Rising.