Colonel Bullsworth, nicknamed The Bull, was an English military officer who commanded a regiment of men during World War I. Bullsworth was a rather small man, with pink cheeks and white-blond hair, who Rupert Davenport thought of as looking like a piglet. He sent Rupert on a mission to deliver a message to Captain McIntyre.

Bullsworth was under the command of Brigadier-General Keswith, and commanded Rupert and Major Thompson.

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