Writers use words to give us a picture or image without actually saying what they mean. Can you trace some images used in the poem?
Such words or phrases are used to trigger our own imagination in painting the picture that they mean. The use of such images in the poem is the following: mouth like a fireplace, chimney for a nose, brave as a barrel full of bears, brave as a tiger in a rage, went at the pirate like a robin at a worm, etc.