Question: What is the name of the suburb in the City of Marion in Adelaide whose plan was laid out by the first Surveyor-General of the Colony of South Australia?

Context paragraphs:
Light's Vision: The first surveyor-general of Adelaide, South Australia, Colonel William Light designed a layout and development programme for the city.  This plan is now known as "Light's Vision".  Notable aspects of Light's plan are that the city centre is laid out in a grid-like pattern, with squares in the centre of the city and in the centres of the four quarters of the city, (NW, NE, SE, SW), and the city is surrounded by Parklands.

Marion, South Australia: Marion is a suburb in the City of Marion in Adelaide around 10 km south-west of the CBD.  Founded as a rural village in 1838 on the banks of the Sturt River, Marion was found to have rich soil and the population expanded rapidly.  Colonel William Light laid out the plan for the village, as he had done with the City of Adelaide itself.

Augustus Alt: Baron Augustus Theodore Harman Alt von Hesse-Kassel (1731 – 9 January 1815) was a British soldier and Australia's first Surveyor-General.

Raffles Hotel, Perth: Raffles Hotel is located at the corner of Canning Highway and Canning Beach Road in the Perth suburb of Applecross, Western Australia.  It is a two-storey hotel designed in the Inter-War Functionalist style and is one of the few examples of a hotel in this style surviving in the Perth metropolitan area.  Earlier named the Canning Bridge Hotel, it has operated continuously as a licensed hotel since at least 1896.  For over 50 years until 2002, it was owned by Australian nightclub owner and property developer Abe Saffron, whose plan to demolish the hotel was successfully opposed by the Art Deco Society of Western Australia in a ten-year campaign.

John Septimus Roe Anglican Community School: John Septimus Roe Anglican Community School (JSRACS or JSR) is a dual-campus, co-educational private school in Perth, Western Australia named after the notable West Australian and first Surveyor-General of Western Australia, John Septimus Roe.  It is a largest member of the Anglican Schools Commission and also noted for having the longest name of any school in Western Australia

John Septimus Roe: John Septimus Roe (8 May 1797 – 28 May 1878) was the first Surveyor-General of Western Australia.  He was a renowned explorer, and a Member of Western Australia's legislative and executive councils for nearly 40 years.

Electoral district of Light: Light is an electoral district of the House of Assembly in the Australian state of South Australia.  As its area overlaps or is adjacent to the south western portion of the Light Regional Council and the south bank of the Light River, it is indirectly named after Colonel William Light, the first Surveyor-General of South Australia.  The electorate was created in 1857, abolished at the 1902 election and recreated at the 1938 election.  Covering a total area of 459.7 km², Light consists of Gawler, surrounding areas and rural areas to the north, extending south of the Gawler River through to the far outer northern Adelaide suburbs of Munno Para West and parts of Munno Para Downs.  It is classed as a rural seat.

William Light: Colonel William Light (27 April 1786 – 6 October 1839) was Eurasian, an artist, naval and army officer and the first Surveyor-General of the Colony of South Australia.  He is famous for choosing the site of the province's capital, Adelaide, and for designing the layout of its streets and parks – in the Adelaide city centre and the Adelaide Park Lands.

Brighton Town Hall, Adelaide: Brighton Town Hall, Hove, is located on Brighton Road, Hove, in the city of Adelaide in South Australia.  The Brighton Town Hall was built in 1869 and was just the fourth Town Hall built in the colony of South Australia.  The architect and builder was George William Highet who arrived in the colony in 1836.  G. W. Highet served as a town clerk and Councillor and died in Brighton aged 80 years.  The hall was constructed of stone from Ayliffe’s quarry in the Adelaide Hills laid on concrete foundations.  The pioneers built it not just as a place for the business of Government but as a place "to serve the wants of the citizens" for many different activities.  On 10 May 1869 a foundation stone was laid by the Hon John Hodgkiss a member of the Legislative Council of South Australia in a ceremony attended by many of South Australia's most important pioneers.  Under this stone was placed a time capsule containing copies of the newspapers of the day.

County of Light: The County of Light is one of the 49 counties of South Australia.  It was proclaimed by Governor George Grey in the 1840s and named for Colonel William Light, the first Surveyor-General of South Australia.  It covers the modern region of the Barossa Valley including much of the northern Mt Lofty Ranges.  It is bounded by the upper Wakefield River in the north, the approximate path of Horrocks Highway in the west, and the Light River in the south.

Supporting paragraphs: Marion, South Australia William Light
Answer: Marion