Charles Frederick Field was the inspiration for which fictional detective?

Charles Frederick Field (1805-1874) was the inspiration for Inspector Bucket in Charles Dickens' novel "Bleak House", first published in serial form between 1852 and 1853. It covers a long-winded and decades long legal case, that of Jarndyce and Jarndyce, that also had some roots in real life.

The police force as we would recognise it nowadays had only been recently founded by the British politician Robert Peel (whose name explains the terms Peeler and Bobby as slang for a police officer). Though some regarded it with suspicion, Dickens was an admirer of it, and developed a firm friendship with Field, often accompanying him on his investigations, though later he began to tire of his tendency to melodrama (he had originally aspired to be an actor). His initial incarnation in his fiction was as "Inspector Wield" in short stories and articles published in the magazine "Household Words" where many of Dickens' works first saw the light of day.

But when he appeared in "Bleak House" his name was disguised more, though it was still a fairly open secret.

Later in life he became a private detective, incurring the wrath of his erstwhile superiors.