Complex sentence: It was at this time the King urged Sir Mokshagundam Visvesvaraya to guide him and it is a well documented that he became Mirza Ismail's mentor.
Split into simpler sentences: It was at this time the King urged Sir Mokshagundam Visvesvaraya to guide him. It is well documented that Sir Mokshagundam Visvesvaraya became Mirza Ismail's mentor.