Solution:
Historians used official records, memos, and letters to write about the last 250 years of Indian history.The official records of the British government are a crucial source of history. The act of writing was significant in British culture. Every directive, strategy, policy choice, understanding, and research had to be spelt out in writing. This gave rise to a culture of memos, notes, and reports in administration. In the opinion of the British, all significant papers and letters should be properly preserved. So, they built record rooms that were connected to all administrative buildings.