CASTES; CHRISTIANS; 1 CHURCH LIFE - EVOLUTION; 1 DIGITAL BOOK ARCHIVE; 1 EARLY RELIGIOUS CONVERSION; 1 MARRIAGE - HISTORY, RULES AND REGULATIONS 1 MARRIAGE CUSTOMS; 1 MARUMAKKATHAYAM (മരുമക്കത്തായം ); 1 MATRILINY; 1 MEDICAL MISSION - HISTORY 1 MISSIONARIES; 1 POLYANDRY; 1 RINGELTAUBE PERIOD; 1 WOMEN - HISTORY - SOCIAL CONDITION - LITERATURE; 1