The document summarizes the history of immigration to Singapore after it was founded by Sir Stamford Raffles in 1819. Large numbers of immigrants came from places like China, India, Malaya, and the Malay Archipelago, attracted by opportunities for jobs, business and security under British rule. The population grew rapidly, with the Chinese becoming the largest ethnic group by 1840. These immigrants established Singapore's early trade in goods from places like Europe, China, Southeast Asia and South Asia, playing a key role in the development of Singapore.