The play was first published in 1892 in The Countess Kathleen and Various Legends and Lyrics (the spelling was changed to "Cathleen" in all future editions). Its text underwent many changes until the final version performed in 1911 and published in 1912 ("a complete revision to make it suitable for performance at the Abbey Theatre" and "all but a new play", according to Yeats).
Earl of Portland is a title that has been created twice in the Peerage of England, firstly in 1633 and secondly in 1689.What proved to be a long co-held title, Duke of Portland, was created in 1716 and became extinct in 1990 upon the death of the ninth Duke, at which point the earldom passed to the most senior agnatic (solely male-line) cousin, namely one of the 6th degree.
Countess Tamrith says they were never very close, but she certainly wasn't expecting him to start a war." Who is Countess Tamrith? "She's the head of one of the noble houses. Young, but smart and very devout. I'm told she studied in Stormhaven, and has Emeric's favor.