Political activity
Described as a sensitive poet-intellectual, MacSwiney's writings in the newspaper Irish Freedom brought him to the attention of the Irish Republican Brotherhood. In 1913, he was one of the founders of the Cork Brigade of the Irish Volunteers, and was President of the Cork branch of Sinn Féin. In 1914, he founded a newspaper, Fianna Fáil, which was suppressed after only 11 issues.
At Christmas 1915, MacSwiney spent a night at the home of the Fleischmanns. While there, he met a friend of his sisters, Muriel Murphy. She was from a rich brewing family in Cork with conservative politics, but in 1915 she became a member of the Gaelic League and Cumann na mBan. MacSwiney and Murphy continued to see each other after the night at the Fleischmanns.
In April 1916, he was intended to be second in command of the Easter Rising in Cork and Kerry, but stood down his forces on the order of Eoin MacNeill. Amongst the confusion about whether to mobilise his forces or not, Muriel Murphy brought him food and information as his forces held up at Volunteer Hall in Cork City.
Following the rising, MacSwiney was imprisoned until December 1916 in Reading and Wakefield Gaols by the British Government, under the Defence of the Realm Act. In February 1917, he was deported from Ireland and imprisoned in Shrewsbury and Bromyard internment camps until his release in June 1917. Muriel followed Terence to England to support him and, upon his release, the two were married on 9 June 1917 in Bromyard, England, one day after Murphy's 25th birthday, and one day after she was eligible for her inheritance, ensuring the independence of the couple from the Murphy family, which had disapproved of the relationship every step of the way. Muriel's bridesmaid was Geraldine O'Sullivan (Neeson), while Terence's best man was Richard Mulcahy.
In November 1917, MacSwiney was arrested in Cork for wearing an Irish Volunteers uniform, and, inspired by the example of Thomas Ashe, went on a hunger strike for three days prior to his release.
In the 1918 general election, MacSwiney was returned unopposed as the member for Mid Cork, representing Sinn Féin, succeeding the Nationalist MP D. D. Sheehan. However, along with 27 other elected members, MacSwiney joined the first Dáil Éireann rather than take up his seat in the UK Parliament. After the murder on 20 March 1920 of his friend Tomás Mac Curtain, the Lord Mayor of Cork, MacSwiney was elected Lord Mayor. Richard Mulcahy wrote to MacSwiney on 8 April 1920 to warn him he was in danger and asking him to agree to have Mulcahy's men protect him at all times, "after what has happened in Cork" (likely a reference to MacCurtain's death less than a month earlier). On 12 August 1920, MacSwiney was arrested in Cork for possession of "seditious articles and documents", and possession of a cypher key. He was summarily tried by a court on 16 August and sentenced to two years' imprisonment at Brixton Prison in England.