“There appears to be no doubt that the defender deviated from the prescribed rotation as to the field in question for crop 1826, and also for crop 1827, and must pay the additional rents for both years: that rent is no doubt high, but still it is rent, not penalty, and this Court must adhere to the bargain between the parties. On account, however, of the high additional rent, and that the pursuers have failed in some parts of the discussion, no farther expenses have been awarded than those previously found due.”