Archival records
- Bodleian Library, Oxford (BODL): Asquith Papers.
- Churchill College Cambridge Archive Centre (CCAC): Hall Papers, Hankey Papers.
- The National Archives (UK) (TNA): series ADM 137, 223, HW 3, 7.
- Harvard University Library (HUL): Page Papers.
- National Archives Canada (NAC): Record Group 25 f8.
- The National Library of Ireland (NLI): MS 14,914.
- Yale University Library (YUL): House Papers.
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