How did George Grierson contribute to the study of Tibeto-Burman languages?

Sir George Grierson made a significant contribution to the study of Tibeto-Burman languages through his direction of the Linguistic Survey of India (1903–1928).12

While scholars and colonial administrators had begun identifying languages genetically related to Tibetan and Burmese in the mid-19th century, Grierson’s survey served as the primary collection point for this early research. Specifically, he dedicated three sections of the survey—Volume 3, parts 1, 2, and 3—to documenting these languages. His work provided essential foundational data, including word lists and brief texts for dozens of little-known "tribal" languages that had previously lacked documentation. This massive compilation of linguistic data laid the groundwork for later comparative studies and the eventual development of modern Sino-Tibetan historical linguistics.2