I want to know the answer to the following question:
Who was rumored to have written the book instead of Lee?
All the background I'm provided with is that "In 2006, a Capote letter was donated to Monroeville's literary heritage museum; in a letter to a neighbor in Monroeville in 1959, Capote mentioned that Lee was writing a book that was to be published soon.". Is that enough to answer the question?