3 ideas
The official record of 1857 was written mostly by the victors, in their administrative language. Songs, sayings and family accounts kept in Awadh villages preserve a different archive: local heroes, betrayals and losses that never reached a gazetteer. Reading the revolt through what villages chose to remember shows its meaning to participants rather than to the administrators who suppressed it.
About a hundred years after an event, the last people who heard it firsthand from eyewitnesses, usually grandparents, are still alive but dying. Collecting at that threshold captures testimony only one link away from the event before it hardens into pure legend or disappears. The window is narrow and cannot be reopened, so timing is the decisive variable in oral-history fieldwork.
Events survive longest in oral culture when they are encoded in songs, couplets and proverbs rather than in plain narrative. Meter, rhyme and communal performance make the content resistant to loss even when literacy is low and writing is dangerous. The same compression also flattens nuance and turns participants into archetypal heroes and villains, so the container preserves emotional truth more reliably than factual detail.