Semaphore was first surveyed for sale in 1849, at which time it was isolated by swamps to the south and the Port River to the east. In 1851,
George Coppin, a prominent publican, theatrical entrepreneur and actor, built a two-storeyed timber hotel on the southern corner of The Esplanade and Blackler Street. A very high flagpole was erected to signal to his "White Horse Cellars" hotel at
Port Adelaide the approach of ships, earning the area the name
Semaphore, often called "The Semaphore". In 1856, an official government signal station was established at the intersection of The Esplanade and Semaphore Road, where officers would record the details of all vessels in
Gulf St Vincent. It was also used to record information on water depth, tides and cargo loading. A Telegraph Office opened in 1856 and became a Post and Telegraph Office in March 1871. In 1875, the Time Ball Tower was erected adjacent to the Signal Station. The area was isolated from
Port Adelaide by the
Port River until 1859 when a wooden bridge, later replaced by the
Jervois Bridge, was opened. The following year saw the construction of the jetty. In 1884 the
Mechanics Institute was built, becoming the Semaphore Town Hall in 1889 (later Semaphore Cinema, and now the heritage-listed
Semaphore Library). The road link to Port Adelaide allowed for more convenient commuting from Semaphore to the commercial area, and contributed to increased residential development in the area, as well as churches, schools and pubs. This was further augmented by the construction in 1878 of a
railway, which attracted affluent holiday-makers to the seaside. Carnivals, sideshows and open air cinemas were opened, and 1917 a
tram service from Port Adelaide was built. From around 1911 until 1919, an open-air theatre showing
silent films used to operate in the summer on the Esplanade, run by the Wondergraph company, until the company built the
Wondergraph Picture Theatre, opened in May 2020. ==Description==