Sentence:  With this assumption, that Tintagel haunted Hardy from 1870 to 1923, it becomes possible to suggest that not only was his <WSD>Tristanian</WSD> work infused with his life-long themes, but that <WSD>Tristanian</WSD> themes may have subtly influenced his earlier works as well. 
Meaning of the word marked with <WSD> tags:  Of or pertaining to Sir Tristan, legendary Arthurian knight and tragic hero of the mediaeval romance "(Tristan and Iseult)".