"It is to answer that question that I decided to delve a little into the history of what could be called "appropriative literature." I wasn't interested so much in the 20th-century tradition of collage poetry--exemplified by "The Wasteland" and The Cantos--as in a more extreme approach in which, rather than weave obvious quotations into his or her words, the writer becomes a kind of scribe, transferring small or large passages, usually without attribution or other signals that these words were written by someone else."
Gathered, Not Made: A Brief History of Appropriative Writing