The effect of colonisation on India are as follows:
(i) The British came to our country and established their rule, subjugating local nawabs and rajas.
(ii) The British established control over the economy and society, collected revenue to meet all their expenses, bought the goods they wanted at low prices, produced crops they needed for export.
(iii) The British rule brought about the changes in values and tastes, customer and practices. It brought about the changes in the political, economic, social and cultural sphere.

James Mill in his book 'A History of British India', divided Indian history into three periods, viz., Hindu, Muslim and British. Mill thought that all Asian societies, including India, had lower level of civilization than Europe. According to him, before British came to India, Hindu and Muslim rulers controlled India. Society was then dominated by religious intolerance, caste taboos, and superstitious practices. Mill suggested that the British should conquer all the territories of India and it was necessary to introduce European manners, arts, institutions and laws for the enlightenment and happiness of the Indians.

Manuscripts documents and letters survey record official documents and letters, memos. National Archives.

The information in police reports tells us only about what officials thought, what they were interested in and what they wished to preserve for future generation. These records do not always help the historians understand what other people in the country felt and what lay behind their actions. However, the information from old newspapers tells us about the feelings and actions of common people of the country. This information may be affected by the personal views of the news editor, but from these, the historians can infer what common men thought about the incident.

James Mill divided Indian history into three periods-Hindu, Muslim and British. But this periodisation is not proper.
There were some problems with this periodisation as follows:
(i) It is improper to refer any period of history as 'Muslim' or 'Hindu' because a variety of faiths existed Simultaneously.
(ii) It is also not justified to characterise an age through the religion of the rulers of the time. During ancient period, all the rulers did not share the same faith.
(iii) Mill, through his periodisation suggested that only British rule could civilize India. He suggested that the British should conquer all the territories in India to ensure the enlightenment as if India was not capable of progress without British help.

The caption of the paiting was 'Mutinous sepoys share the loot'. In the eyes of the British; the rebels were greedy, vicious and brutal. So, the British painters described them as mere looter. The British historians tended to overlook the civil and national aspects of the revolt and called it merely a sepoy mutiny.

In his book, 'A History of British India', James Mill divided Indian history into three periods-. Hindu, Muslim, and British. He thought that all Asian societies were at a lower level of civilisation than Europe. Mill pointed out that before the British came to India, Hindu and Muslim despots ruled India. At that time, some factors like religious intolerance, caste taboos, and superstitious practices dominated India's social life. Mill felt that only British rule could save the Indians from the darkness. Thus, he advocated the theory of expanding colonisation, i.e. the British should conquer all the territories in India to ensure enlightenment and happiness for Indians. He strongly believed that India can be capable of progress only with the help of the British. In this way, he justified the British rule in India.