More translation work on the Gaelic entry, at ainm.ie, by Breathnach and Ní Mhurchú. This article is longer and better detailed the the Gaelic sleeve notes to Gael-Linn's "Máire Ní Scolaí" vinyl LP released in 1971. The two articles/sets of notes do not always agree.

Both articles, writing of the early career of this singer, agree on the locations where she began making a name for herself.
In 1923, at the age of fourteen, she began competing on the Feiseanna circuit; she was then based in Dublin, where she studied singing with Mrs. M.J. Gallagher at the Mhodhscoil Láir. By 1927, she went for the first time to Galway, where her eventual marriage would locate her, where she would put down roots. But she went elsewhere in between. According to the Gaelic article from ainm.ie:

[translated] Máire Ní Scolaí related to Patrick Reilly that her teachers encouraged her to go into teaching herself. It was suggested to her, following her initial successes in Dublin, that she spend some time in co. Waterford, at the Colaiste an Rinne (spelling?). Here I interject a comment: the ainm.ie article has remarked on Séamus Clandillon, with his pioneering Gaelic-language radio broadcasts, to which he welcomed Ní Scolaí. Clandillon, it may be verified, was himself a native of co. Waterford. He may well be included amongst the professional mentors who urged Ní Scolaí to deepen her knowledge of Gaelic, both the language and the artistic traditions around it.

Sometime between 1923 and 1927, Ní Scolaí immersed herself in a course of study that lasted between a month or six weeks, say Breathnach and Ní Mhurchú. They don't say when. The Colaiste an Rinne in co. Waterford is well known for its summer sessions, with intense immersion into Gaelic; so I am wondering if, in the mid to late 1920's, our budding singer was not amongst the summer students, studying at the college, boarding with locals, and speaking Gaelic exclusively at home and in class.

Patrick Reilly's Gael-Linn recording sleeve notes pay lip service to the studies at An Rinn, and drop the names An Fear Mor, Nioclois Toibin, and Cormac O Cadhla.   More to come.