esperanto_story1-2, Exercise 1: Sources for "Białystok inspired Zamenhof"

Model answer (check the details):

1. Zamenhof's own later writings and letters (for example, a long letter of 1905 describing his childhood). Kind: first-hand, but written decades later, for an audience, and shaped by his aims. Trust: good evidence of what he wanted people to believe about his motives; weaker as proof of what he thought as a boy.
2. His foreword to the 1887 Unua Libro and later speeches. Kind: first-hand and public. Trust: reliable for what he publicly claimed at the time; it is persuasion as well as description.
3. Biographies by family members and early followers (for example, by his daughter or by Esperanto writers). Kind: second-hand, often admiring, often repeating each other. Trust: useful for details, but check whether the author knew the facts or was passing on a story.
4. Modern historians and linguists of the Russian Empire and of Jewish history. Kind: independent, with access to census and archive material. Trust: strongest for the town's real language mix and the political background.
5. Local sources in Białystok today (museum, Zamenhof Centre). Kind: commemorative. Trust: good for places and objects, with the usual caution about pride in a famous native.

Conclusion: the story is well attested as Zamenhof's own account, and plausible given the town's mix of languages, but the exact line from childhood experience to the language needs the caveat "according to Zamenhof".

Care: keep "he said" apart from "it happened".