Note: every manifestation of a letter is counted, so the number of documents in a repository may be larger than the number of letters.

Repository Number of documents Further details
Warwickshire County Record Office 9 City: Warwick, Warwickshire
Country: England
Wellcome Library 304 City: London
Country: England, United Kingdom
Wiltshire Archaeological and Natural History Society Library 1 Alternative names for repository: Wiltshire Archaeological and Natural History Society Museum
City: Devizes, Wiltshire
Country: England, United Kingdom
Wisbech & Fenland Museum 1 City: Wisbech
Country: England
Woodhorn Museum and Northumberland Archives 3 Alternative names for repository: Northumberland Record Office
City: Ashington
Country: England
Worcester College Library, University of Oxford 2 City: Oxford
Country: England, United Kingdom
W├╝rttembergische Landesbibliothek Stuttgart 7 Alternative names for repository: Wurttembergische Landesbibliothek Stuttgart
City: Stuttgart
Country: Germany