厄Chronology

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6107008001120123014101590160017001800 720–799810–11191160–12291290–14091420–15891720–1799

1

1

1

2

1

1

1

1

1

1

1

1

5

3

1

1

9 +3

2

1

1

No year recorded 10

+4

Each crop stands at the decade of the first year its book's date gives; a date given only as before a year stands at that year. Dates come from the catalogues and editions cited with each record. The bars draw the whole span and their counts to scale; in the strip below them, fifty years or more with no crop are folded and marked. Japanese dates converted with HuTime ↗