Dobbs is born in County Antrim on November 19, 1871 to barrister Conway Edward Dobbs who is Justice of the Peace for County Antrim, High Sheriff for Carrickfergus in 1875 and High Sheriff for County Louth in 1882. Her mother is Sarah Mulholland, daughter of St. Clair Kelvin Mulholland of Eglantine, County Down. The family spends time living in Dublin where Dobbs is born. She attempts to learn Irish, however, when her father dies in 1898 her mother moves the family back to Glenariff.
Dobbs is interested in learning Irish and finds it easier to learn in County Donegal where it is still spoken. Her first teacher is Hugh Flaitile. She attends the Irish College at Cloughaneely in the Donegal Gaeltacht. She brings the idea of promoting the language to the Glens of Antrim and her circle of friends. She is one of the small number of Protestant women interested in the Gaelic revival.
The year 1904 sees the “Great Feis” in Antrim and Dobbs is a founder member of the Feis na nGleann committee and later a tireless literary secretary. In 1946, the Feis committee decides to honour her by presenting her with an illuminated address. It can be seen today at Portnagolan House with its stained glass windows commemorating a great Irishwoman. During her speech she says, “Ireland is a closed book to those who do not know her language. No one can know Ireland properly until one knows the language. Her treasures are hidden as a book unopened. Open the book and learn to love your language.”
Dobbs writes seven plays, published by Dundalgan Press in 1920, though only three are actually performed. The Doctor and Mrs. McAuley wins the Warden trophy for one-act plays at the Belfast festival in 1913. Her plays, however, are generally not a success and after 1920 she never writes another. She continues to work on historical and archaeological studies and her articles are published in the Ulster Journal of Archaeology, in a German magazine for Celtic studies, in the French Revue Celtique and in the Irish magazine Ériu.
Roger Casement is a good friend and although Dobbs never makes her political opinions known she contributes to his defence costs when he is accused of treason. Although her political views are not clearly known, Dobbs has been a member of the Gaelic League and in the executive of Cumann na mBan.
Dobbs dies at her home, Portnagolan House, Cushendall, on January 2, 1962.