Rob: When you said you only get 4 letters a year from NR readers, we knew there must be something wrong. Sure enough, on checking round the office, we found that practically all your reader mail since 1997 has been filed away in the wrong rack of cabinets by mistake. There are actually several thousand items.

We are going to start forwarding them to you this week in batches of a few hundred at a time. Sorry about that!

(PS: Kathryn and I took the liberty of opening a few. They were all really, really angry.)