In 1892, Felix and Evaline Mathis family moved to a homestead three and a half miles southeast of Thomas, Oklahoma. The family farmed and operated a post office known as Cora Post Office, ran a grocery store, and operated a blacksmith shop. Felix was an ordained Baptist minister who held religious services, performed wedding ceremonies and conducted funerals over a wide area.

In 1906, the family moved to Hemphill County to a place known as Eller Flats. They farmed the land where Mrs. Floyd Parks now resides. Felix and Evaline Mathis are buried at Eller Flats Cemetery now known as Prairie Dell Cemetery. This cemetery is located on a hill overlooking the farm land which was farmed by Felix and Evaline.

Eller Flat Cemetery located east part of Hemphill Co, TX. The 13th child of Felix & Evaline was a baby boy buried at Mt. Oliver Cemetery, Thomas, OK.