Simplify the following text for a Grade 11 native English-speaking person.
Original: After studying in Britain and gaining the ARCO and FRCO diplomas at the Royal College of Organists , he studied modern history at the University of Toronto from 1911 to 1914 .
Simplified: After studying in London at the Royal College of Organists , he studied modern history at the University of Toronto from 1911 to 1914 .