Appleby at Allington is a 1968 detective novel by the British writer Michael Innes.

[1] It is the twentieth in his long-running series featuring Sir John Appleby of Scotland Yard, now retired.

It takes the form of a Golden Age country house mystery with elements of farce.

It was released in the United States by Dodd, Mead under the alternative title Death by Water.

[2] A review in the Times Literary Supplement described it as a "tasty, vintagey Innes, with the only disadvantage that he doesn't allow himself space to develop the many engaging characters and plot potentials".