I believe the William McMurry mentioned was William Wallace McMurry (Sr.), my direct ancestor, who is listed in the 1820 U.S. Census for Dickson County as being the head of a household containing one free white male age 26-45 (himself), one free white female ages 16-25 (presumably his wife, Mary Reid -- Reed? Read? -- whom he married in 1819), one white male age 16-26, two white males ages 10-15, and two white females ages 10-15.As the younger members of the household could not possibly have been William's children, it seems quite likely that Sally and William were two of the children listed.
The best I have from notes compiled by my late uncle, John Bryan McMurry (Jr.) is that William McMurry was born in North Carolina in 1793, possibly in Rutherford County.Ancestry.com indicates that his father was probably one Thomas McMurry, born in Rutherford County, NC, sometime around 1770, and deceased in Dickson County, TN, in 1812.The family tradition in my branch of the McMurrys is that those that came over the mountains into Tennessee around the end of the 18th century were bricklayers and brick makers who originally came to a little town called Parsons in what is now Decatur County, TN, and later moved on up to Dickson County.
I am guessing that the Thomas McMurry referenced above is probably the Thomas McMurry named as an inheriting son in the will of Samuel McMurry, which was written in 1793 and proven in Rutherford County, NC, in 1803 (presumably the year of his death).Any further information regarding William Wallace McMurry, Thomas McMurry, or Samuel McMurry would be quite welcome.