The Clock in the Hatbox is a 1939 mystery detective novel by Anthony Gilbert, the pen name of British writer Lucy Beatrice Malleson.

[1] It is the fifth in her long-running series featuring the shady London lawyer and detective Arthur Crook.

Reviewing it for the Times Literary Supplement, Maurice Percy Ashley noted "The tale is very fairly told.

One of the jurors at the trial of the attractive Viola Ross, accused largely on circumstantial evidence of smothering her husband, has severe doubts about the case.

Convinced now of her innocence he engages the solicitor Arthur Crook to investigate the case and discover what really occurred.