Tristan and Iseult
Swinburne had first read the story of "Tristan and Iseult" as a child, and at Oxford, influenced by Morris, wrote a number of Arthurian poems including "Queen Yseult", "Lancelot" and "Joyeuse Garde". Following the publication of Tennyson's "The Holy Grail" in 1869 Swinburne "set to work in earnest on the theme of Tristram and Iseult."