lord 1397; and if so be that thy yere be passid the date, wryte
that date, and than wryte the nombere of the yeres. Than withdrawe
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the yeres out of the yeres that ben passed that rote.
Ensampul as thus: the yere of oure lord 1400, I wolde witen,
precise, my rote; than wroot I furst 1400. And under that
nombere I wrote a 1397; than withdraw I the laste nombere
out of that, and than fond I the residue was 3 yere; I wiste
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that 3 yere was passed fro the rote, the whiche was writen in