Four drawings, one for each season, each done in a monochrome colour fitting for the season. Spring (mossy green): Jon is showing off his shadow puppet skills and projecting an angry dog (a hound, one might say) onto the wall to an amused Sherlock. Summer (emerald green): the scene is framed as if it's seen looking up through a house window. Sherlock is hugging Jon and he looks upset about something. Autumn (warm sunset): A gentle kiss under the shadows of ivy. Winter (cold white and soft warm light): Sherlock is leaning over the piano that Jon is playing and they both look happy.