Tomassa was born into a well-off family in the
Centralist Republic of Mexico. As a young child, she and her older cousin were captured by the Carissa
Comanche. No one came to claim them, so they were taken in by a wealthy Mexican family who treated them as servants. In 1867, after the signing of the
Medicine Lodge Treaty, Joseph Chandler received a 320-acre
headright under the treaty’s provisions. This headright was located about thirty miles northeast of Fort Sill, and the Chandlers became one of the first families to benefit from the treaty. Tomassa supported the Fort Sill Indian Agency by helping establish the Fort Sill Agency School. In 1871, she began working at the school as a translator. Fluent in Spanish, English,
Comanche, and
Caddo, she played a crucial role in assisting the fort's officials and maintaining communication with the Comanche, which helped in preventing raids. Following Joseph Chandler’s death in 1873, Tomassa became involved with the Quaker-run school established at the Kiowa-Comanche Agency. She worked as both a student and an interpreter at the school. During this time, she played a role in protecting a Mexican couple who had been captured by the Comanche as children. Tomassa hid them from their pursuers in her home and later surrendered them to Indian Agent Lawrie Tatum. Tomassa was known for her compassion, which earned her respect from both the
Indian agents and the Comanche. Tomassa was a widow with four children. She later married George Conover, a retired army officer, and had several more children. In 1887, she converted to Christianity and joined the
Methodist church. Tomassa died in 1900 and was buried on her ranch in western
Grady County, Oklahoma. == References ==