The constitutional reforms enacted by the Indian Councils Act of 1909, named after Secretary of State John Morley and Viceroy Lord Minto, best known for introducing separate (communal) electorates for Muslims.
Separate electorates (the seed of communal politics and eventually Partition) and the "first Indian in the Viceroy's Executive Council" are very high-frequency facts with a clear constitutional and human-rights angle.
Morley-Minto (1909) introduced separate electorates only for Muslims; their extension to other groups (Sikhs, Christians, Europeans, Anglo-Indians) came with the 1919 reforms and the Communal Award (1932).
1909 (Morley-Minto): separate electorates for Muslims; Minto the "Father of Communal Electorate"; Sinha first Indian in the Viceroy's Executive Council.