Marie-Grace cant wait to begin her journey up the Mississippi River with her father The steamboat theyre traveling on is the biggest and fanciest boat Marie-Grace has ever seen Its crowded with all sorts of interesting passengers including Wilhelmina Newman a girl her age Wilhelmina is traveling alone and shes carrying a secret in one of her trunks--clues to hidden Gold Rush treasure Marie-Grace and Wilhelmina have to unravel the clues to find the gold--and theyre not the only ones looking for it An illustrated Looking Back essay provides facts about the s
