I perched my ground station on a forked tree trunk that lies on the grass in Hackney Downs. The bark and most of the trunk is wet but, unlike fallen trees that I've seen in forests, it doesn't feel like its decomposing. I wondered whether this tree has been preserved in some way, or whether its decomposition is slowed by the relative bareness of its surroundings.

In today's satellite image, the the rivers Garonne and Dardogne are very prominent, carving a dark line into the west coast of France and joining into a delta meeting the Atlantic. In the High North, Lake Onega is a pale white, suggesting it is entirely frozen.