I started out to install my new bike seat, instead ended up cleaning out the bike shed. This was a much more visceral experience than the term "cleaning" usually implies, including hosing down the interior walls with the domestic equivalent of a fire hose, and hauling in buckets and buckets of sand to relevel the brick-and-sand floor. Now the shed is drying out, the contents are all over the lawn, and I'm too tired to pursue the bike seat. Must rest.