According to the book, Eva-Lotta's father Master Baker told her when he and his friends spoke Rövarspråket as boys.

They run to Prärien, a place at the outside of their city Lillköping where the mansion from the 18th century is, and "Röda Rosen" have made it to their headquarters.

When Eva-Lotta is ordered to go to the mansion and get Stormumriken, he sees Gren and the man with the green gabardine trousers.

Vita Rosen team eats too much of this candy and decides to split one chocolate bar and take it with.

Sixten's dog Beppo barks happily at Anders, but he makes him quiet; he gives him Eva-Lotta's chocolate bar he was saving for later.

When Eva-Lotta sees a tattoo on his hand, she recognizes him and tells Kalle and Anders in Rövarspråket that he is the murderer.

He denies everything, until the proofs come; Benka, who collects stamps, has the chocolate-letter and finally Eva-Lotta finds the promissory note in her pocket, and he confesses.