AT the home of the Blanchards, everything is topsy-turvy, and with reason. Think of it! Mlle. Yvonne is to be married Tuesday, and to-day is Friday!Callers loaded with gifts, and tradesmen bending under packages, come and go in endless procession. The servants are at the end of their endurance. As for the family and the betrothed, they no longer have a life or a fixed abode. Their mornings are spent with dressmakers, milliners, upholsterers, jewelers, decorators, and caterers. After that, comes a rush through offices, where one waits in line, gazing vaguely at busy clerks engulfed in papers. A fortunate thing, if there be time when this is over, to run home and dress for the series of ceremonial dinners-betrothal dinners, dinners of presentation, the settlement dinner, receptions, balls. About midnight, home again, harassed and weary, to find the latest accumulation of parcels, and a deluge of letters-congratulations, felicitations, acceptances and regrets from bridesmaids and ushers, excuses of tardy tradesmen. And the contretemps of the last minute-a sudden death that disarranges the bridal party; a wretched cold that prevents a favorite cantatrice from singing, and so forth, and so forth. Those poor Blanchards! They will never be ready, and they thought they had foreseen everything!