Arakan. There was no international boundary between Bengal and Arakan and no restrictions on migration between the regions. In the early 19th century, thousands of Bengalis from the Chittagong region settled in Arakan seeking work. It is hard to know whether these new Bengal migrants were the same population that was deported by force to Bengal's Chittagong during the Burmese conquest in the 18th century and later returned to Arakan as a result of British policy or they were a new migrant population with no ancestral roots to Arakan. The British census of 1872 reported 58,255 Muslims in Akyab District. By 1911, the Muslim population had increased to 178,647. The waves of migration were primarily due to the requirement of cheap labour from British India to work in the paddy fields. Immigrants from Bengal, mainly from the Chittagong region, "moved en masse into western townships of Arakan". Albeit Indian immigration to Burma was a nationwide phenomenon, not just restricted to Arakan. For these reasons historians believed that most Rohingyas arrived with the British colonialists in the 19th and 20th centuries with some tracing their ancestry much further. According to Thant Myint-U, historian and adviser to President Thein Sein, "At the beginning of the 20th century, Indians were arriving in Burma at the rate of no less than a quarter million per year. The numbers rose steadily until the peak year of 1927, immigration reached 480,000 people, with Rangoon exceeding New York City as the greatest immigration port in the world. This was out of a total population of only 13 million; it was equivalent to the United Kingdom today taking 2 million people a year." By then, in most of the largest cities in Burma, Rangoon, Akyab, Bassein and Moulmein, the Indian immigrants formed a majority of the population. All of Burma was officially a Province within the British Indian Empire ('the Raj') from November 1885 until 1937, when Burma became a separate Crown colony within the British Empire. The Burmese under British rule felt helpless, and reacted with a "racism that combined feelings of superiority and fear". Professor Andrew Selth of Griffith University writes that although a few Rohingya trace their ancestry to Muslims who lived in Arakan in the 15th and 16h centuries, most Rohingyas arrived with the British colonialists in the 19th and 20th centuries. Most have argued that Rohingya existed from the four waves of Muslim