Chains

..my baby's got me locked up in chains... (that's for Mile Stones in Portugal!) When we go by the house that has these cement posts out in front, we pretend we're unhooking our mighty steeds, before galloping off down the green. ("My horse is named Beauty" says one. "Mine's Felicity" the other chimes in. "Actually, mine's called Arabella," says the first. "Actually mine's called ...." Ten minutes later we finally get going!) We don't know what they were used for really, but it seems a likely explanation!