Boston Lodge is situated at Penrhyn Isa, Minffordd, Penrhyndeudraeth, on the A487 road about 1 mile SE across the Afon Glaslyn causeway from Porthmadog, Gwynedd in north-west Wales. It has a station on the Ffestiniog Railway and is the location of the railway's main engineering workshops, locomotive shed and carriage works. The Boston Lodge address and postcode is shared by the works with four cottage dwellings (mostly occupied in connection with the railway) and with the former tollgate cottage at the end of the causeway. The original 'Penrhyn Isa' cottage (now the railway works office) was renamed 'Boston Lodge' after Boston, Lincolnshire, the parliamentary seat of William Madocks, the proprietor of the land reclamation venture. Early history Construction of the causeway, known locally as ‘The Cob’, linking Penrhyn Isa on the Merioneth shore with the small rocky island called Ynys Towyn (where Britannia Terrace now stands in Porthmadog) near the Caernarfonshire shore, started in 1807 and was completed in 1811 during which time large quantities of stone was quarried and extracted from both ends. The embankment, which was the final stage of the Traeth Mawr land reclamation scheme, was wide at the top (where the railway now runs), wide at the base, deep and about in length. The quarrying created both the Britannia Terrace site at Porthmadog and the railway workshops site at Boston Lodge. 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. Festiniog Railway In the years from 1847 to 1851 the works was considerably developed by the construction of ferrous and non-ferrous foundries, a pattern making shop, a blacksmith's shop, a carpenter's shop, and an engine house in which a steam engine provided power for machinery in a sawmill, pattern shop and machine shops. In the 1870s further construction provided a paint shop, joiner's shop and erecting shop in which in 1879 and 1885 the double Fairlie engines Merddin Emrys and Livingston Thompson were built. Prior to 1915 the works employed about 30 men. During World War I most of the