"... Following years of local agitation the Legislature of Upper Canada passed an act to establish the County of Elgin in August of 1851. St. Thomas, in its role as county town, became the site of the county buildings, a courthouse and a jail. Throughout these years St. Thomas served as the distribution centre for the area, but when the Great Western Railway was built through London joining it to Niagara Falls and Windsor in 1854, and ultimately to Toronto in 1855, this was a blow to the village. Despite many years of efforts on the part of townspeople to facilitate the construction of a railway through their town St. Thomas had been spurned by railway companies. Desperate to be served by a rail link to potential markets, St. Thomas supported, and provided substantial sums towards, the construction of the London and Port Stanley Railway which opened in 1856. The effect was the complete opposite of that which had been hoped for, however, as merchants and businessmen lost customers to larger stores and firms in nearby London.
After years of economic stagnation which saw an actual decline in population, St. Thomas energetically boosted the establishment of the Canada Southern Railway. In 1870 St. Thomas voted a bonus of $25,000 to the railway to ensure that it establish its headquarters in the town. London, which at least partially owed its economic prosperity to its location on the Great Western Railway and its role as terminal point of the London and Port Stanley Railway, worked to deter the construction of the Canada Southern. The Great Western offered to build a branch line to St. Thomas and, when the Canada Southern commenced construction, the GWR proceeded with this scheme in an effort to protect its business. After years of endeavours to gain a rail line St. Thomas got two lines. This led to a race to complete the tracks, won by Great Western which opened its route to St. Thomas in February 1872. The Canada Southern opened its eastern section on 1 August 1872, the first train from Amherstburg reaching St. Thomas in December 1872. ..."