4/5 Officials didn't know exact tax figures. c.f. 6/12/49 - kei same as koyun {gl : goat same rate as sheep}(?)
Fields - measured every 10 - 20 years by officials - not a survey, they measure all fields in the village, takes them 2 or 3 days - this is the basis of field
tax. Figures are obtainable.
k<field tax, tax surveys>
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