Source Archives

Alexander Turnbull Library, National Library of New Zealand; Bibliothek für Zeitgeschichte, Württembergische Landesbibliothek, Stuttgart; Bristol Central Library; Bristol Archives; Brotherton Library, University of Leeds; Cambridge University Library; City of Westminster Archives; Coventry History Centre; Essex Record Office; Glenbow Museum; Hooge Crater Museum; Hoover Institution Library and Archives; Imperial War Museums; Landesarchiv of Baden-Württemburg (Hauptstaatsarchiv), Stuttgart; Mills Memorial Library, McMaster University; Mirrorpix; National WWI Museum at Liberty Memorial, Kansas City; Northamptonshire Record Office; Over the Top Collection; Robert Opie Collection; Sanctuary Wood Museum (Hill 62); Soldiers of Gloucestershire Museum; the British Library; and the National Archives, UK.