Elfyn co-edited The Bloodaxe Book of Modern Welsh Poetry with John Rowlands, then issued her bilingual selected poems Eucalyptus.
She co-edited The Bloodaxe Book of Modern Welsh Poetry with John Rowlands, which won a Poetry Book Society recommendation. When Elfyn issued her bilingual selected poems Eucalyptus, (Gwasg Gomer, 1995), Tony Conran described her as "the first Welsh poet in 1500 years to have her work known outside Wales." 
