led by Charles Duncombe. Consequently, the British government located its Ontario peninsular garrison there in 1838, increasing its population with soldiers and their dependents, and the business support populations they required. London was incorporated as a town in 1840. On 13 April 1845, a fire destroyed much of London, which was then largely constructed of wooden buildings. One of the first casualties was the town's only fire engine. The fire burned nearly of land, destroying 150 buildings, before it burned itself out later that day. One fifth of London was destroyed in the province's first million-dollar fire. Development John Carling, Tory MP for London, gave three events to explain the development of London in a 1901 speech: the location of the court and administration in London in 1826, the arrival of the military garrison in 1838, and the arrival of the railway in 1853. The population in 1846 was 3,500. Brick buildings included a jail and court house, and large barracks. London had a fire company, a theatre, a large Gothic church, nine other churches or chapels, and two market buildings. The buildings that were destroyed by fire in 1845 were mostly rebuilt by 1846. Connection with other communities was by road, using mainly stagecoaches that ran daily. A weekly newspaper was published and mail was received daily by the post office. On 1 January 1855, London was incorporated as a city (10,000 or more residents). In the 1860s, a sulphur spring was discovered at the forks of the Thames River while industrialists were drilling for oil. The springs became a popular destination for wealthy Ontarians, until the turn of the 20th century when a textile factory was built at the site, replacing the spa. Records from 1869 indicate a population of about 18,000 served by three newspapers, churches of all major denominations and offices of all the major banks. Industry included several tanneries, oil refineries and foundries, four flour mills, the Labatt Brewing Company and the Carling brewery in addition to other manufacturing. Both the Great Western and Grand Trunk railways had stops here. Several insurance companies also had offices in the city. The Crystal Palace Barracks, an octagonal brick building with eight doors and forty-eight windows built in 1861, was used for events such the Provincial Agricultural Fair of Canada West held in London that year. It was visited by Prince Arthur, Duke of Connaught and Strathearn, Governor-General