Contents: 1. Introduction. 2. Sketch of British Relations with Bhutan Proper. 3. The Extra-Bhutan Bhutias. 4. The Akas-Hazabi-Khawas and Kapachors. 5. he Duphla Tribes. 6. The Abors and Miris. 7. The Mishmis. 8. General Review of Policy the Sub-Himalayan Border. 9. The Khampti Clans of Sadiya. 10. The Singphos of Sadiya. 11. The Moamabiahs of Muttuck. PART- II: 12. The Naga Tribes: A- The Patkoi Nagas. 13. The Naga Tribes. B- The Seebsaugor nagas. 14. The Naga Tribes. C- The Angami Nagas. 15. North Cachar. 16. Manipur. 17. The Mikibs and Rengma Nagas. 18. The Khasi and Jaintia Hills. 19. The Garos. PART- III: 20. Hill Tipperah. 21. The Lushai or Kookis Tribes. 22. Hittagong Frontier Tribes. 23. Conclusion.