In The Onyx Lobby by Carolyn Wells — Read

But it proved no easy matter to trace the whereabouts of Sir Herbert Binney between the hours of twelve and two on the night he met his tragic death.

The detectives were aware that he said a pleasant good-night to the chorus girls he had entertained at supper, and had left the Magnifique, alone, about midnight, but then all trace was lost. Naturally enough, for peaceable citizens are not noticed if they follow a beaten or usual path.