The duties of the posts of Investigators of this Unit are mainly executive in nature. They are responsible for speedy and adequate collection of materials from different sources in the districts as well as in Bangalore City. This work has to be attended to in close unison with the Editors. For collection of source-materials, they are required to go to several Government offices, contact various officers from the State head-quarters level to the Taluk level and approach also knowledgeable persons, institutions, concerns, etc., in different fields, locally and in interior parts of the districts by touring.

The Investigators have to receive briefings and necessary guidance from the Chief Editor and Editors in various matters relating to Gazetteer work. Some guidance is also being obtained from standard works published in the past in this behalf on several topics into which the Investigators are required to investigate. The job required, on the part of the Investigators, constant contact with many departments, semi-government bodies, institutions and with the members of the public in the task of gathering of requisite materials for the Gazetteer volumes which are monumental works of abiding value to the society. They have to obtain also information and data regarding miscellaneous occupations and customs and traditions of the people of different areas according to specially prepared questionnaires. They have to visit several places in the districts for securing additional information, amplifications and clarifications wherever needed. Thus, the work of Investigators involves itinerant duties and they have the responsibility of gathering the needed source-materials speedily.