Ah, the famous section 4 of the Statute of Frauds. Every law student knew of it, few actually read it, but it meant, in effect, that you could sell a piece of land by writing a description of it, putting the price, and both parties signing. So you could sell 5,000 acres on the back of an envelope, because the paper was an enforceable memorandum, a provision replicated in the Law of Property Act 1925. My late father, faced with a farmer, a vendor who didn't trust lawyers (how strange), did exactly this to buy a farm. His own solicitor, presented with this scruffy bit of paper, was horrified, but the conveyancing was done.