Low Buston
I think the low red brick building used to house a hydraulic ram for the Hall. Some parts of the machinery seem to be in situ. It may have been modified as a pill box though doesnt appear to be recorded as such.
A hydraulic ram, or hydram, is a cyclic water pump powered by hydropower. It takes in water at one "hydraulic head" (pressure) and flow rate, and outputs water at a higher hydraulic head and lower flow rate
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