economic system for its immediate region. South Johor and the Riau Archipelago supplied products to Singapore for export elsewhere, while Singapore was the main source of foreign products to the region. Archaeological artefacts such as ceramics and glassware found in the Riau Archipelago evidence this. In addition, cotton was transshipped from Java or India through Singapore. In 1984, an archaeological excavation had commenced at Fort Canning Hill led by the archaeologist Dr John Miksic. A range of artefacts including earthenware, ceramic, and porcelain pieces were found which suggests Singapore's role as an active trading port in the 14th century. By the 15th century, Singapore had declined as an international trading port due to the ascendance of the Malacca Sultanate. Local trade continued on the island. A map of Singapore by Portuguese mathematician Manuel Godinho de Eredia showed the location of Xabandaria or the office of a shahbandar, the Malay official responsible for international trade. Shards of 15th-century Siam ceramics and late 16th – or early 17th-century Chinese blue and white porcelain have been found at the Singapore and Kallang Rivers. Singapore also provided other regional ports with local products demanded by international markets. For instance, blackwood (a generic term used by Europeans to refer to rosewood) was exported from Singapore to Malacca, and was in turn purchased by Chinese traders and shipped to China for furniture-making:) In the early 17th century, Singapore's main settlement and its port were destroyed by a punitive force from Aceh. After this incident, there was no significant settlement or port at Singapore until 1819. 1819–1960 In 1819, Stamford Raffles, a British colonial official, excited by the deep and sheltered waters in Keppel Harbour, established for the British Empire a new settlement and international port on the island or a trading port. Keen to attract Asian and European traders to the new port, Raffles directed that land along the banks of the Singapore River, particularly the south bank, be reclaimed where necessary and allocated to Chinese and English country traders to encourage them to establish a stake in the port-settlement. Chinese traders, because of their frequent commercial interactions with Southeast Asian traders throughout the year, set up their trading houses along the lower reaches of the river, while English country traders, who depended on the annual arrival of trade from India, set up warehouses along the upper reaches. The port relied on three main networks of