That's the worst of girls," said Edmund to Peter and the Dwarf. "They never can carry a map in their heads." "That's because our heads have something inside them," said Lucy.
Girls aren't very good at keeping maps in their brains", said Edmund, "That's because we've got something in them", replied Lucy.
I thought I could describe a state; make a map of sorrow. Sorrow, hoever, turns out to be not a state but a process.