M. L. Sims was the eldest child of Minor J. Sims and Malinda Cook. M. L.’s father, Minor J. Sims, died in 1847 when he was twelve years old. He lived with his widowed mother and siblings in Maury County, Tennessee, until he was about twenty. M. L. Sims moved to Red River County, Texas, about 1855 to study law. He became a lawyer and remained in Clarksville the rest of his life. His youngest brother, S. A. Sims, followed him to Red River County, in the 1860s. S. A. Sims also studied law and became a lawyer in Clarksville, Red River County.
In 1860, M. L. Sims was a twenty-four year old attorney in Clarksville, Red River County, Texas. He lived at an inn run by John W. Hughes. M. L. and Sue Sims lived in Clarksville, Red River County, Texas, in 1870. They lived in Clarksville in 1880. Sue’s mother, S. T. West, and her sister, Lucy Lane, lived with them.
M. L. and Sue Sims lived on Main Street in Clarksville in 1900. Sue Sims was head of the family in Clarksville, Red River County, Texas, in 1910. In 1920, Sue Sims, grandmother, lived with Roy and Lucy Goodman in Clarksville.