Via the Literature Compass Blog I note the existence of The Willa Cather Archive:
The Willa Cather Archive is team-based scholarship. Each component requires the substantial work and interactions of Cather specialists, technical specialists, graduate and undergraduate students, administrators, and more. The Cather Archive brings together the Cather Project from the University of Nebraska-Lincoln English Department, the Center for Digital Research in the Humanities at UNL, and the Archives and Special Collections of the UNL Libraries, and a full list of the individuals working on the project can be found here: cather.unl.edu/staff.html. As a scholar working on this project, I feel extremely grateful to learn so much from so many, and to create something that I feel at once is extremely useful for the scholarly community and can push that community in new directions.