The Case with Nine Solutions is a 1928 detective novel by the British writer Alfred Walter Stewart, published under his pseudonym J.J.

[1] It is the forth in his series of novels featuring the Golden Age Detective Chief Constable Sir Clinton Driffield.

[2] Doctor Ringwood, acting as a locum in a small town while the GP is away, is called out one very foggy evening to attend to an urgent case.

He goes next door to telephone for the police, and examines the patient he had been called out to tend to who is suffering from scarlet fever.

He returns to the other house to stand guard until Sir Clinton Driffield and his colleague Inspector Flamborough arrive.