Disillusionment of ten o'clock

To me this poem showed imagination. At ten o"clock its dark, and that is when your imagination comes out to play. He lists vivid colors and talks about baboons. He also mentions
and describes "haunted house of white nightgowns" which is what the common person would imagine at night, so perhaps the more disillusioned you are, the more imagination you have. We should all indulge in our disillusions more and perhaps the would would be a more imaginative place.