This book investigates the question of relations between the Croatian national revival movement and the Serbs from 1830 to 1847. A special investigation attention is put on the problem how the language influenced ethnonational group identity among the Croats and Serbs in Dalmatia, Croatia and Slavonia (the so-called Triune Kingdom) during the period of the Croatian national revival movement that was officially and not only formally named as the Illyrian Movement. This work is an attempt to reconstruct the main stream of the politics by the leaders of the movement and their outlines how to solve both the Croatian and the South Slavic questions within a part of the Central and the South-East Europe and reactions by the Serbs to such politics.