Aunt Dahlia sends Bertie to "sneer" at an antique, silver cow creamer, in order to keep its price down.
Jeeves steals the unique silver cow creamer, using it as the car/motor mascot and hiding it as a hood/bonnet ornament and radiator cap on Wooster's car.
Sir Roderick Spode is appalled when he learns that Madeline Bassett is engaged to Gussie Fink-Nottle.
He is perpetually in fear that his followers in his first role will discover his second one and it is the threat of this disclosure which is used by Jeeves to stop him assaulting Bertie.
Jeeves reveals the secret pseudonym "Eulalie" and finds a way of keeping Spode from beating Bertie into a jelly.