"Delaware River (N.Y.-Del. and N.J.)" . . . . . . . . . . . . . . "A review of the question of the outlet lock at Black's Eddy" . "A review of the question of the outlet lock at Black's Eddy"@en . "A Review of the question of the outlet lock at Black's Eddy"@en . . . "Electronic books"@en . . . . . . . . . . "Delaware River (N.Y.-Del. and N.J.)" . .