Thanks for replying. I'm related to the Shearers through Matthew's (b. 1767) son Willis (b. abt. 1805, d. 1841 in MO). His oldest son, Mathew (b. abt 1833), was my g-grandmother's grandfather.
Since I wrote my query, I've learned some things about Matthew's (b. 1767) family, his father, siblings, and children. My focus, however, has been on his son, Willis. I'd be delighted to share what I have on Willis' family. I haven't looked into Matthew's family much, so what I have is only what has been given me by others.
I look forward to hearing from you.