. . "Detective and mystery stories Juvenile literature." . . . . . "Ten-year-old Ben wants to be just like his father, a waterman on Chesapeake Bay, however, crabs, rock-fish and oysters are not as plentiful as they once were. Ben makes friends with a scientist who is looking for the source of an oil leak in the bay and Ben decides to help."@en . . . . "Fiction"@en . "Juvenile works"@en . . . "Two boys from a small town on the Chesapeake Bay help a scientist interested in cleaning up the water for the benefit of animals, plants, and people, while risking parental disapproval of people with too much education and of outsiders' interference in their means of earning a living."@en . . . "Trouble at Marsh Harbor"@en . "Trouble at Marsh Harbor" . . . . . . "Chesapeake Bay (Md. and Va.)" . .