You are looking for a small black lock and seal box.
Room for small swaps and geocoins etc.
The cache is hidden near to the Pigeon House Footbridge which
crosses the canal.
The bridge was probably named after a large dovecot, often
called pigeon houses, at Pyrford Manor which was built near here in
the late 16th century.
Pigeons and doves were highly prized for the menu in manors at
the time and their droppings were also used as a saltpetre
ingredient for gunpowder, and often the cotes were extravagant and
impressive structures worthy of note.