Thirlage was a Medieval Legal classification, which developed in Scotland in the 13th Century AD. In description, it was a Law that restricted a ''Bonded'' Worker from harvesting extra grain or produce for personal sale. In other words, what was ''grown'' – regardless of excess, was owned by a Manor Lord and as such could be disposed at His own wish (normally for extra monies for His ''purse''). Various legal precedents were brought forth thru the centuries to regulate excess, but in most cases – The Manor Lord won. In the 1770s, Scotland ended such regulations – by which a Tenant Farmer could in fact, keep excess produce and crops and derive payment from another source.