鴨Chronology

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10001100164017001800 1010–10991160–1639

1

1

1

4

14 +8

2

2

1

3

1

6

32 +26

3

4

4

No year recorded 42

+36

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 ↗