These materials are mainly Willoughby's notes on her book, A Power for Good: The History of Trinity Parish, Columbus, Georgia, with photographs by Mike Culpepper, published in 1999. These materials include her notebooks, newspaper clippings, transcriptions and photocopies of Trinity Episcopal Church vestry meeting minutes, compilations of deeds, lists of pastors, deacons and bishops, etc.

In addition to the folders relating to the Trinity Episcopal Church, there is one folder containing copies of the illustrations for her book, Flowing Through Time about the Chattahoochee River, published in 1999.