Would not Mrs. Inglethorp have preferred to go unavenged rather than have such terrible dishonour fall upon the name of Cavendish. 
Inglethorp would do anything for vengeance. Anything.
mnli hypothesis: Inglethorp would do anything for vengeance. Anything. premise: Would not Mrs. Inglethorp have preferred to go unavenged rather than have such terrible dishonour fall upon the name of Cavendish. 