How much weight should a historian give letters and memoirs compared with official records?
Short answerTest them against archival evidence and each other; corroborated personal material can add detail where official records are incomplete.
NotesHe tests personal letters and memoirs against archival material, then looks for corroboration across multiple accounts. Agreement on verifiable details raises confidence in personal testimony while leaving room for memory and perspective. When a central file is absent, neighbouring Admiralty, communications, and diplomatic records can establish who participated and what questions remain. The personal papers of those people may then help reconstruct a defensible history without pretending that missing official evidence never mattered.