Lair of the White Worm: Chapter VI-VII
A.: Hypnosis and a dead mongoose.
Q.: What do the book and film "Lair of the White Worm" have in common?
The villains in both use hypnosis to gain control over their victims. The difference is that in the book, it is Mr. Caswell who uses hypnosis, and in the film it is Lady Marsh (i.e Lady March) who uses hypnosis.
Lady Marsh (i.e. Lady March) kills a mongoose in both. In the film, she very well may have broken the back of the poor creature, but, in the book, she breaks its back by shooting it with a revolver, then empties her gun into it. Which would seem to be overkill, in this case.