And her one and only failure in true politeness lay in this excess of politeness; which it was easy to identify as one of the professional "wrinkles" of a lady of the Faubourg Saint-Germain, who, always seeing in her humbler friends the latent discontent that she must one day arouse in their bosoms, greedily seizes every opportunity on which she can possibly, in the ledger in which she keeps her social account with them, write down a credit balance which will allow her to enter presently on the opposite page the dinner or reception to which she will not invite them.