Constable Bridge is under the cursor on the map in the attached Boyd's Maps link. If you toggle through the various maps, you will see that the bogs to the north and west, known as Constable Bogs, were there at least as far back as 1885 according to Cook's Map. The amount of work it took to build those bogs in the 1800's is hard to fathom. If you and the Scouts are up for a challenge, you can explore the area around those bogs.
I wish I knew more of the history of the Constable Bridge and bogs but I don't. Maybe someone else can dive in.