His dissertation was later published as Spanish Romanesque Architecture of the Eleventh Century (Oxford University Press, 1941). In 1932, he did the first full transcription of the medieval Codex Calixtinus in Santiago de Compostela.
His dissertation was later published as Spanish Romanesque Architecture of the Eleventh Century (Oxford University Press, 1941). In 1932, he accomplished the first complete transcription of the medieval Codex Calixtinus in Santiago de Compostela.