He certainly "used" music he disliked, in his discussion of Wagner in A Tramp Abroad and I think in an essay or two. His comments on opera audiences contain the usual exaggerations, but are sometimes acute. He makes rather loving fun of the popular musical war-horses of ante-bellum days (e.g. "The Battle of Prague") in the Grangerford episode of Huckleberry Finn and the somewhat parallel "House Beautiful" chapter of Life on the Mississippi. Life on the Mississippi also includes a chapter of Huck's story that Twain later decided not to include in the novel. In that chapter a raftsman sings a verse or two of a slightly ribald ballad he liked (about a woman who loved her husband, but loved another man "twice as well"). See also his use of a song from "The Mikado" in "The Man That Corrupted Hadleyburg." And see the early chapter of Pudd'nhead Wilson where Angelo and Luigi are presented as European-trained performers of four-handed piano pieces. All in all, I suspect the more you examine Twain's writings, the more bits of favorite music you'll find. .....In fact, the longer I stretch this message the more I recall--doesn't he include his own lengthy version/spoof of "The Erie Canal" in Roughing It? And where is it that he praises highly the Fiske Jubilee singers?--He hears them perform in Europe and they remind him achingly of his early days. I seriously doubt you'll find anything as formal as the Faulknerian tricks you mention--for Twain it's likelier to be casual quotes and allusions. But I do urge you to explore his travel books and such as well as his fiction. Whoops...one more before I shut up. Is it in the Autobiography that he says he has always found a couple of lines from "My Old Kentucky Home" haunting and unbearably sad? Mark Coburn