What metaphors are used in Big Blonde by Dorothy Parker?

The metaphorical connection between Mrs. Morse and a beast of burden is extended in the second description Parker offers of a workhorse. Mrs. Morse again encounters a horse on the way out to Jimmy's, and in this scene it is a direct catalyst to the black mood that leads by the end of the night to Mrs. Morse's suicide attempt. Again, there is a parallel established between Mrs. Morse's struggle to walk and the horse's.