I have been searching for the Watson family also. I am descended from the George W. Watson you referred to. He was born in 1848 or 1849 in Missouri. He is on the 1870 Grayson County Texas census (can not make out the wife's name), their daughter born in 1869 is Mary Alice Watson (my great grandmother). George W. later married again and had a son, George Thomas Watson, b. 1899. George W. Watson died in 1921 in Grayson County, Texas from suicide (he hung himself from a tree). Supposedly, it was because he was losing everything due to the great depression. George's father's name was Cornelius Thomas Watson and his mother's name was Mary Ann Coleman. They are in the 1850 census in Missouri. George was 1 year old. I don't have any information on his brother James.