http://worldofdrjustice.blogspot.com/2016/03/a-locked-room-mystery-inside-out.html ]
This (let us call it) sub-subgenre
of the whodunit, in which it is the (amateur) detective who is “locked in”, and
-- denied sight -- must judge by muffled sounds, is brought to the pitch of
perfection, and indeed to spiritual depth, in G.K. Chesterton’s short story,
“The Queer Feet” (1910; collected in The Innocence of Father Brown). Here Father Brown is temporarily
sequestered in a closed chamber off a back passageway; and from this vantage, deduces all,
both factual and spiritual, based simply upon the footfalls of an unnatural
gait. Indeed, the story is a kind of rhythmic pendant to the
visual-geometrical masterpiece, "The Wrong Shape".