Melissa Cook Gates, Simpson Co. MS.

Need info on Melissa Cook's parents and siblings. Melissa Cook married R.Collin Gates, Jan.5, 1896 in Simpson County,MS.
Melissa had a sister named Dora who married George E. Gibbons around 1903. Dora died about 1910. Melissa and Dora had a brother, Henry Cook who, at some point, moved to Nacogdoches, Texas and lived there until his death, probably in the 1960's. Any bit ofinformation, no matter how small, regarding this family will be so very much appreciated!
Bettye Edwards