An inspector of Scotland Yard with the tenacity of a bulldog, Sherlock Holmes categorized him as lacking in imagination and often out of his depth. He shares a professional rivalry with Inspector Gregson. According to Watson, his physique is lean and ferret-like. Despite his condescending attitude towards Sherlock Holmes and his methods, he frequently consults the Great Detective when a particularly singular crime leaves him at a loss. He is not as reluctant to take full credit for solving the case, however. PCs adventuring in London will likely make his acquaintance in cases where Scotland Yard is brought in.