怨Chronology

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51061070080090010001100141016801700177018001900 520–609750–799910–9991010–10991160–14091420–16791720–17691830–1899

2

3

1

2

1

1

1

1

2

1

4

2

1

2

1

2

1

1

2

1

9 +3

1

1

1

1

No year recorded 26

+20

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 ↗