Here's a very interesting report on a settlement agreement in a dispute between the Estate of James Joyce and a Stanford professor who wrote a biography of Joyce's daughter, Lucia. The academic won a declaratory judgment allowing her to publish on her website exerpts from works relating to James and Lucia Joyce, the copyrights to which belong to the Estate.
Here's the press release. Academic scholarship is a paradigmatic example of fair use. I strongly suspect that the Estate was aggressive just to scare people away from engaging in copying that is undeniably protected.