MacLean's finest work is to be found in the sequence of themed poems, "Dain Do Eimhir agus Dain Eile"/ "Poems to Eimhir" and "Other Poems" (1943). Written mostly during the 1930s, the sequence consists of forty-eight love poems addressing a universal 'eimhir', or woman. At the heart of the poems is a sense of lamentation for lost love and opportunity yet they are also sharply political.