Here are a couple examples:
* "The flies were thick as summer rain" - This line uses a metaphor (a direct comparison without "like" or "as") to paint a vivid picture of the overwhelming number of flies. This conveys the unpleasantness of the environment Bill is in.
* "He twisted round and gripped the bar, And yelled a wild and bitter curse" - This line uses personification by attributing human actions to the "bar" of the bicycle. This adds to the intensity of the moment as Bill struggles with the difficult terrain.
While not traditional similes, these examples and other figurative language in the poem help create imagery and emphasize the challenges Bill faces.