One of the oldest princely states in the Rajputana region of northern India -- Sirohi, forms an important empire of ancient Indian history. Based on an indepth study of scattered archival material, unpublished records, Government reports and also contemporary literary works, the present study attempts to reconstruct the social, political and economic history of Sirohi, during the 19th century. However the main focus of the study is on examining the relations of the Sirohi State with the British rulers. The contemporary administrative system of the State has also been discussed. It is a well-documented and well-researched work.