The old Cornish units of measurement were used in the 1700s and based on English measurements in their name and rough size, although had slight difference in their values.^[1]

Richard Carew's Survey of Cornwall (1602) says:^[2]

Commonly thirtie Acres make a farthing land, nine farthings a Cornish Acre, and foure Cornish Acres, a Knights fee. But this rule is ouerruled to a greater or lesser quantitie, according to the fruitfulnesse, or barrennesse of the soyle.

Cornish acre – 120 statute acres (or possibly 64), 8 score lease. Equal to 0.066 Acres. Cornish ferling/farthing – ¼ a Cornish acre Cornish lease – four sticks Cornish stick – four yards, three yards square Cornish Knight's fee – four Cornish acres Cornish rod – 160 lace to a Cornish acre, 36sq. rods Cornish lace – 18 ft square Cornish land rod/lorgh – half a lace, 9 ft square