1.  Jordan R. Dodd, ed.  1993.  Kentucky Marriages:  Early to 1850.  Liahona Research, Orem, UT (Broderbund CD-229):

Hopson, William

Willis, Susan

Jan 3, 1842

Christian Co.

2.  1850 Census Index/Microfilm (online at GenealogyLibrary.com):  District No. 2, Christian Co., KY, p. 420B, enumerated 16 Oct 1850 (extracted by Diana Gale Matthiesen):

890	941	William H Hopson	28	M	Physician	3800	Kentucky
		Susan       "	20	F			"
		Maxwell     "	24	M	Physician		"
		James M     "	19	M	Printer		"
	942	Ann      Holeman	35	F		1200	"
		Nevill M    "	15	M	Student		"
		Josephine L "	12	F			"
		Mary E Lander	15	F			"

Susan's age has to be a mistake — or did he really marry a 12-year-old girl?!  Or is Susan his sister, and our subject is not the William who married Susan WILLIS in 1842?  Maxwell, James, and Widow Ann (HOPSON) HOLMAN are almost certainly William's siblings.  Living four doors down from Richard D. BRADLEY.