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.
Richard Carew's Survey of Cornwall (1602) says:
Cornish acre â 120 statute acres (or possibly 64), 8 score lease. Equal to 0.066 Acres. Cornish ferling/farthing â ü a Cornish acre Cornish lease â four sticks Cornish stick â four yards, three yards square Cornish Knight's fee â four Cornish acres Cornish rod â 160 lace to a Cornish acre, 36sq. rods Cornish lace â 18 ft square Cornish land rod/lorgh â half a lace, 9 ft square