Not as well sustained as its predecessor, The Firehouse Mystery, this is a disappointment, for there is definite need for good mysteries at this third grade and up level. There are echoes of the earlier book in the general pattern of the story, as once again a youngster determines to raise the fog that hangs over a beloved relative's reputation. This time, however, the long arm of coincidence plays too important a part, while the children intervene in most unlikely ways. The atmosphere of the East River waterfront seems paper thin. A contrived and amateurish story.