In the eighteenth century when Porthmadog and Blaenau
Ffestiniog did not exist this part of Wales was a remote mountain
area. As far back as 1798 W.A.Madocks had required land and soon
afterwards carried out reclamation projects, first on the shore of
Treath Mawr, which then extended several miles inland to Pont
Aberglaslyn, and culminating in the great embankment, the Cob,
right across the estuary. The workman for this project were housed
in a building at the eastern end of the Cob, where the workshops of
the railway are now situated. Since Madocks was the Member of
Parliament for Boston Lodge in Linconshire, he called the building
Boston Lodge. At the other side of the estuary the Cob diverted the
River Glaslyn, which scoured a channel to form the natural harbour
that was to play a dominant role in the history of slate mining and
the Ffestiniog Railway. This harbour was called Port Madoc, known
locally today as Porthmadog.
The cache is a small tube container and is hidden
along the cycle path along the Cob. You can access it by foot by
the nearby lay by. You do not have to go onto the road to find the
cache.