After the establishment of the Irish Free State, Stuart participated in the literary life of Dublin and wrote poetry and novels.

(1936) in which he lists what he regards as provocations to rage, he claims he has seen The first of these lines is accepted as referring to Gonne and the second to Stuart (Elborn 1990).

He threw her out of her own room with such violence that she fell on the landing half-dressed at the feet of Claud Chevasse who was staying in the house at the time.

"[8] It was also during the 1930s that Stuart became friendly with German Intelligence (Abwehr) agent Helmut Clissmann and his Irish wife Elizabeth.

[citation needed] Stuart was also friendly with the head of the German Foreign Office Legation in Dublin, Dr Eduard Hempel, largely as a result of Maud Gonne MacBride's rapport with him.

Iseult intervened with Clissmann to arrange for Stuart to travel to Germany to give a series of academic lectures in conjunction with the DA.

Stuart travelled to Germany in April 1939 and was hosted by Professor Walter F. Schirmer, the senior member of the English faculty with the DA and Berlin University.

[citation needed] In July 1939, Stuart returned home to Laragh and confirmed at the outbreak of war in September that he would still take the place in Berlin.

He also reactivated his acquaintance with Abwehr asset Helmut Clissmann who was acting as an advisor to SS Colonel Dr Edmund Veesenmayer.

Around August 1940, Stuart was asked by Haller if he would participate in Operation Dove and he agreed, although he was later dropped in favour of Frank Ryan.

Before deciding to accept this job he discussed it with Frank Ryan, and they agreed that no anti-Semitic or anti-Soviet statements should be made.

[9] In his radio broadcasts, he frequently spoke with admiration of Hitler and expressed the hope that a victorious Nazi Germany would help create a united Ireland.

However, Stuart did write the following in a 1924 Sinn Féin pamphlet (discovered by journalist Brendan Barrington, see Bibliography):Austria, in 1921, had been ruined by the war, and was far, far poorer than Ireland is today, for besides having no money she was overburdened with innumerable debts.

At that time Vienna was full of Jews, who controlled the banks and the factories and even a large part of the Government; the Austrians themselves seemed about to be driven out of their own city.

[12]Simon Sebag Montefiore later interviewed the elderly poet, noting that ‘During my interview with Stuart in 1997, he showed no regret for backing Adolf Hitler and reveled in quoting chilling outrageous reflections on the toxic nature of Jews.’ In 1945 Stuart decided to return to Ireland with a former student, Gertrude Meissner; they were unable to do so and were arrested and detained by Allied troops.

In 1991 he made an extended appearance on British television: on 16 March he took part in an After Dark discussion called The Luck of The Irish?

The statement from the Irish Times read out in the High Court accepted "that Mr Stuart never expressed anti-Semitism in his writings or otherwise".