Sunny Smile is a magazine story.
Henry hates hot days. First, he almost derails on a buckled rail, then, he runs out of water on a steep hill. Next, a spark from his funnel sets the dry grass alight at the side of the line. Finally, Henry is dazzled by the sun and smashes some buffers in the yard and derails. The next day, Henry tell the Fat Controller he is ill because he does not want to work in the sun any more. He changes his mind when he is told to pull the Seaside Special. At the seaside a breeze from the sea keeps Henry happy and cool.