Contents: 1. Preface. 2. Acknowledgements. 3. A brief account of the Ganga Valley Civilization of Eastern India from excavated sources at Chandraketugarh: [Introduction, History of Partial excavations, Fortified city planning and structures, Comparative similarities between Mohenjodaro and Gangahrada, (Religious practices, science and technology, navigation and foreign trade of pre-Mauryan Bengal)]. 4. Catalogue of alphabetic signs from Chandraketugarh. 5. Methodology of decipherment: (Tantric Code, Pictophony, Homographemic Brahmi Script, Brahmi Script and Kharosti Script of Ashokan and Kaniskan periods, Similarities of signs among Brahmi Script, Kharosti Script and Indus Script, Ten vowels, Two diphthongs and thirtythree consonants of the Indus-Brahmi Hybrid Script, Origin of Brahmi Script, Origin of Kharosti Script, Rethinking of the hypothesis of Kharosti and Kharosti-Brahmi inscriptions in West Bengal). 6. History of pre-Mauryan and Mauryan Bengal and references of Kings and Queens from inscribed sources. 7. Geography of pre-Mauryan and Mauryan Bengal and references of place-names from inscribed sources and references of place-names from South-East Asian Sources. 8. Hindu Gods and Goddesses of pre-Mauryan and Mauryan Bengal from inscribed sources. 9. References of Lord Buddha from inscribed sources : stony evidence as to the correct time of Lord Buddha. 10. Philosophy of the Proto-Indic people of ancient Bengal. 11. Science and technology of pre-Mauryan Bengal: (Astronomy, Metallurgy, Metrology and Numismatics). 12. Social activities of pre-Mauryan Bengal. 13. Some post-Harappan inscriptions. 14. Bibliography.