Intelligence Department: papers, compiled in 1960s, relating to the creation of Criminal Intelligence Department (later called the Intelligence Bureau); and the operation of the Central Intelligence Officer System, 1937-47
Irregular Corps and Special Forces: papers, compiled in 1960s, relating to corps including Gardner's Horse; Poona Horse; and Border Military Police Dated as: pre 1947
Railway Police: papers, compiled in 1960s, relating to its history and organisation, including various personal accounts by policemen and an extract from S K Ghosh: Crime on the Increase (1969) Dated as: 1865-1930s