Had a big day sweeping up the drive this weekend after the recent storms. The road was covered in broken branches and twigs. Most of it went onto the pile for the barbecue. A windfall, literally that which falls due to the wind, whether fruit such as apples or more mundane but valuable pickings as kindling, has now become understood as an unexpected gain or profit. Both terms co-exist, and are yet one more of the million examples of language change, this time due to new and related concepts grafted onto old, moribund terms, breathing new life into language as has always been the case...