The India-Rubber Men is a 1929 crime novel by the British writer Edgar Wallace.
It was part of a series of books featuring the character Inspector Elk of Scotland Yard.
Police hunt for a gang called the India-Rubber Men, who wear gasmasks and rubber gloves, and carry gas bombs to stave off pursuit.
In 1938 it was turned into a film The Return of the Frog starring Gordon Harker.
[1] It was loosely adapted into the 1962 West German film The Inn on the River, part of Rialto Film's long-running series of Wallace adaptations.