Email correspondance between members of The New Yorker staff and one of Caitlin Flanagan's sources in writing this story about Mary Poppins' author P.L. Travers. The source, Travers biographer Valerie Lawson, wrote a letter to the editor complaining that Flanagan had not properly attributed items in the story to Lawson. "The exchange offers a glimpse at the sausage-factory aspect of how the magazine handles complaints, and raises interesting questions about what journalists owe, in terms of recognition, to their sources."