One of the things I've learned from working on this project is that sleep is overrated. An average of four hours per night over the last couple of months has aged me considerably and, but seeing so many people on bikes as I did today makes it all worthwhile.
However, there is a limit. For the last 21 days, out of the 18 nights I had the chance to sleep, I never managed to sleep in the same place twice - and it's killing me. We have three nights on our break in Vienna. If I manage to spend these three nights in the same bed, I'll probably go up in flames and be born again from the ashes. Then they'll kick me out for smoking in the room.