Who wrote about a boy detective and a white fox terrier?

The character of a boy detective and his white fox terrier is prominently featured in the works of British author Enid Blyton. Her famous series, "The Famous Five," includes a young boy named Julian and his dog, Timmy, who, while not a fox terrier, embodies the adventurous spirit of the genre. Additionally, the character of "Noddy" by Blyton, also features a dog, but the specific pairing of a boy detective with a fox terrier is most closely associated with the works of Blyton and other similar children's literature.