 Morgan was an admirer of the work of the metaphysical poet Henry Vaughan, who had lived near Brecon.She collaborated with Louise Imogen Guiney on a volume of Vaughan's work, with biographical sketch and historical notes, but these two died before finishing the job and it was taken over by Dr. F. E. Hutchinson.Hutchinson published a comprehensive book about Vaughan based on their work in 1947.