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In page Boston Lodge:

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The site at Boston Lodge first held barracks for many of the 150 men working from the Merioneth side on the embankment construction, together with stables and smithies for the horses and wagons used to carry the stone. Later with the coming of the horsedrawn Festiniog Railway, the stables and smithies were brought back into use from 1836 onwards and there has been almost continuous development of the site for railway purposes since that time.