Lord Cornwallis introduced several important reforms to India's judicial system during his time as Governor-General from 1787 to 1793. His key reforms included: 1) Reuniting the revenue and judicial functions in districts under the collector, while also appointing registrars to assist with civil cases. 2) Establishing the Sadar Nizamat Adalat to oversee criminal cases and the Sadar Diwani Adalat to act as a court of appeal. 3) Realizing flaws in the existing mohamedan criminal law and working to improve it to better prevent corruption and ensure justice.