The return was wretched: 'at three times your sowing you ought to have 6 bushels, worth 3 s. ' The total cost is thus 3 s. 1 1 / 2 d. ; and without debiting anything for rent and manure, the loss would be 1 1 / 2 d. an acre. The anonymous Treatise on Husbandry of about the same date says, however, that 'wheat ought to yield to the fifth grain, oats to the fourth, barley to the eighth, beans and peas to the sixth.' [84] In the years 1243-8 the average yield of wheat at Combe, Oxfordshire, was 5 bushels per acre, of barley a little over 5, oats 7. In the Manor of Forncett, in various years from 1290 to 1306, wheat yielded about 10 bushels, oats from 12 to 16, barley 16, and peas from 4 to 12 bushels per acre. [85] As for the dairy, 2 cows, says Walter, should yield a wey, (2 cwt) of cheese annually, and half a gallon of butter a week, 'if sorted out and fed in pasture of salt marsh;' but 'in pasture of wood or in meadows after mowing, or in stubble, it should take 3 cows for the same.' Twenty ewes, which it was then the custom to milk, fed in pasture of salt marsh, ought to yield the same as the 2 cows. A gallon of butter was worth 6 d. , and weighed 7 lb. And the anonymous treatise says each cow ought to yield from the day after Michaelmas until the first kalends of May, twenty-eight weeks, 10 d. more or less; and from the first kalends of May till Michaelmas, twenty-four weeks, the milk of a cow should be worth 3 s. 6 d. ; and she should give also 6 stones (14 lb. per stone) of cheese, and 'asmuch butter as shall make as much cheese.' [86]