An important development during this period was the establishment of the Narrow Gauge Railway Museum at Tywyn Wharf station. The first exhibit for what was to become the museum was a locomotive donated in 1952 by Guinness from their recently closed St. James's Gate Brewery railway. In 1954 the Preservation Society agreed to start work on a formal museum and exhibits from around the United Kingdom were acquired to form the nucleus of the collection. In 1955 work started on converting the old gunpowder store at Wharf station into a temporary museum building, and in 1956 the first exhibit arrived at Tywyn.