Cyrus Thomas was a famous American scholar majorly known for his contribution to ethnology, entomology and archaeology during late 19th century. Cyrus Thomas was on in Kingsport, Tennessee and formerly worked as a teacher before signifying himself as a government entomologist. Thomas's affiliation with the Smithsonian Institution's Bureau of American Ethnology was a major factor in his influential role in the discipline of anthropology. He carried out ground-breaking research on prehistoric mound builder civilizations, concentrating on the Ohio and Mississippi valleys. He published a large number of papers and articles that greatly contributed to the field's understanding of Native American archaeology and ethnography. His thorough research established the groundwork for later anthropologists and entomologists, leaving a lasting legacy. Those who study the rich archaeological and ethnological legacy of the United States are influenced and motivated by Cyrus Thomas's lifelong commitment to solving the secrets of the country's past civilizations.