He was a member of Irmandades da Fala and Seminario de Estudos Galegos and was high school professor after the Spanish Civil War broke out.

In 1923, at the age of 18, he established the “Sociedade da Lingua” (Language Society) in Pontevedra along with Sebastián González García-Paz and other fellow students.

In 1924, he began studying Philosophy and Literature at the USC[1] His first public appearance was to present Joaquín Núñez de Couto, and speak out against tyrants.

The first year he went to a preparatory school, where there were three professors: Ciriaco Pérez Bustamante (History), Armando Cotarelo Valledor (Literature) and Ramón Gallego García (Philosophy).

At the seminary, the grant from the Junta para Amplificación de Estudios allowed him to participate in the cataloging of castros in the area around Lalin and he started studying Galicia's historic geography.

He had to work in private education and, with the priest Ramon Davila Garcia, created the Academia Menendez y Pelayo in the country house of Amarante [gl] starting in 1950.

On the 19 April 1951 he was named tenure member of the Real Academia Gallega (English: Royal Galician Academy),[4] where he was admitted on 8 May, taking over Castelao's place.

He was introduced by Salustiano Portela Pazos, Ramón Otero Pedrayo and Luís Iglesias Iglesias, and his entrance speech “Roseiras e paxariños nas cantigas dun serán (Coplas que se cantaban nas ruadas de Loureiro de Cotobade)”, was answered by Otero Pedrayo.

In 1969 Fraguas organized, in collaboration with Xoán Naya Pérez and Ricardo Carballo Calero, an exposition about the traditional Galician dress for the Padre Sarmiento Institute.

Other roles and activities that Fraguas carried out in his life were the coordination of the Cultural Anthropology section of the Galician Culture Council; promoter, librarian of the Real Academia Galega de Ciencias; correspondent for the Real Academia de la Historia,[4] the Associação dos Arqueólogos Portugueses and the Portuguese Association of Anthropology and Ethnography.

His wake was held at the auditorium in the Galician People Museum, before his remains were laid to rest next to Aurelio Aguirre and Ramón María del Valle Inclán, in Boisaca cemetery [gl].