係Chronology

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7408101100172018001900 750–809840–10991160–1719

2

1

1

1

1

1

1

7 +1

1

5

1

2

1

1

1

2

4

2

1

6

No year recorded 25

+19

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 ↗