text:  When a person drains his own land of course reason is the only constraint by which he can be withheld from doing as he likes with his own; or where a yearly tenant drains part of his farm at his own expense the risk is exclusively his and his landlord who perhaps refuses to give any effectual aid can have no right to dictate as to the mode in which the draining is to be performed; but when the landlord contributes either directly or indirectly to the expense he or his agent--if he has one who is skilful enough--should insist upon every thing being done according to the most improved which in reality are also ultimately the most economical principles