Lewis Sydney Steward O’Malley, also known as L. S. S. O'Malley (1874-1941), one of the most esteemed colonial, 'official' anthropologists in British India, served as a member of the Indian Civil Service (ICS) from 1898 to 1924. 
Biography.
Lewis Sydney Steward O'Malley was born on October 23, 1874, in Flitcham, Freebridge Lynn, Norfolk, England, to Bryan O'Malley, a minister. He married Ida Sewell Prichard on November 24, 1900, at the Cathedral in Calcutta, India. He passed away in 1941 in Oxford, Oxfordshire, England. O'Malley served as a British Civil Servant in India and received his education at Norwich Grammar School and Hertford College, Oxford, where he earned his B.A.
In 1898, he joined the Indian Civil Service (ICS) and spent several years working as a Magistrate and Collector in Bengal. He later served in the General and Revenue Departments in Bengal. He retired in 1924 with the honor of Companion of the Order of the Indian Empire (C.I.E.).
Throughout his career, O'Malley published numerous works, including the "Bengal District Gazetteers" for Santal Parganas and Purnea, for which he was the editor. He also authored "Indian Caste Customs" in 1934, "Popular Hinduism" in 1935, and "Modern India and the West" in 1941.