George Gavan Duffy (1882-1951) was an Irish politician, barrister and judge. He unsuccessfully defended Roger Casement at his trial for high treason after the Easter Rising. His legal practice represented many of those detained in the aftermath of the Rising. Austin Stack (1879-1929) was commandant of the Kerry Brigade of the Irish Volunteers in 1916. He was arrested in the aftermath of the Easter Rising and interned in the Prison Camp at Frongoch, Wales. Michael Collins (1890 – 1922) was a member of the Irish Republican Brotherhood and he took part in preparing arms and drilling troops for the Easter Rising. He fought in the GPO alongside Pearse and Connolly and was arrested after the surrender. He escaped execution and instead, along with up to 1,800 others, was interned in the Prison Camp at Frongoch, Wales. General Sir John Maxwell (1859 - 1929) was primarily responsible for government policy in the immediate aftermath of the Rising. Maxwell was in sole charge of trials and sentences by 'field general court martial', which was trial without defence or jury and in camera. He had 3,400 people arrested, 183 civilians tried, 90 of whom were sentenced to death. Fifteen were shot between 3 and 12 May. Frongoch Internment Camp in Wales was a makeshift prison used for the internment of approximately 1,800 Irishmen in the wake of the Easter Rising, 1916. It was to become known as the 'University of Revolution' because of the revolutionary nature of the inmates. This letter is about the cases of Stack and Collins (believed to be Michael Collins). In the writer's opinion (supported by other correspondence) the holding of 'in-camera' courts martial had no legal basis. The matter was the subject of debate in the House of Commons. He believes the case against these men is very weak and wouldn't stand up in open court. The writer goes on to suggest some avenues worth exploration by Counsel. Gavan Duffy encloses two documents: an order signed by General Maxwell, and Counsel's opinion in the cases of Stack & Collins.