The Forsytes were resentful of something, not individually, but as a family; this resentment expressed itself in an added perfection of raiment, an exuberance of family cordiality, an exaggeration of family importance, and — the sniff. Danger — so indispensable in bringing out the fundamental quality of any society, group, or individual — was what the Forsytes scented; the premonition of danger put a burnish on their armour. For the first time, as a family, they appeared to have an instinct of being in contact, with some strange and unsafe thing.

The Man of Property (1906) Volume I of The Forsyte Saga.