This work is chiefly occupied with the manuscript materials for the study of Seventeenth Century British India, and deals with the records preserved in the British archives. It provides an account of the rich and varied data preserved at various places. It is a result of over 8 years of uninterrupted work by the author. Every important document discussed has been subjected to a close and careful scrutiny, and references have been given to printed works that throw further light on the matter.