This has been a particularly heavy week. On two days I had back-to-back appointments, meetings and functions from eight in the morning till eight in the evening with literally not a moment to look at those e-mails or start on the files as they piled up. The other three days were scarcely less heavily charged. This evening I put on my Facebook account that I was at the end of a ‘very, very, very long week’. This is factually correct. It felt at times like swimming a length under water. At the same time, though, the week went by with extraordinary speed. The busier you are, the faster time goes, is one way of looking at it. Is there a good theory about the human relativity of time out there? What was that you said? Einstein? Oh, yes…