Sloops and anti-sloops

We sailed up the Stour on Friday sloop rigged and we are sailing down on just the staysail. The Scientific American I haven't been reading reminds me that every particle has an anti-particle. It feels like we have morphed - neutrino-like from one form to another.

I wanted a lie-in but we found we were too close to Pintail of Morra for comfort. Quite how we can have dragged our mooring upwind is beyond me. We motored off the mooring and headed straight down river. Four or five boats are now visible behind us.