Manuscripts
The Frederick R. Koch Collection, at the Beinecke Rare Book and Manuscript Library of Yale University, houses the vast majority of surviving Walton manuscripts.
Additional manuscripts are located in the following collections or libraries, which are organized geographically
United Kingdom:
Continental Europe:
United States:
Asia:
There are also several manuscripts which are held in private collections. These are specified on the relevant compositions' pages, which can be accessed from the Catalogue of Works.