Protection of life and property of the people from foreign aggressors and
internal criminals has been the cardinal duty (Rajdharma) of the rajas according
to Manu Samriti. For this purpose, the rajas have been putting spies in their
kingdoms for the detection of criminals and getting them punished as also in
foreign countries to apprise their masters about what has been happening there,
particularly in relation to their countries. In other words intelligence and law
enforcement has been there right from the vedic period to modern time. In this
book writer has tried to find out the machinery existing in ancient period as
revealed in Vedas, Samritis,