Is this your Henry Singleton and Elizabeth?http://www.rootsweb.com/~gaforsyt/census/50/0301_0599.htm

1850 Census Forsyth Co., GA
31st District (Dwellings 301 thru 599)
302-1 Henry Singleton 50 m Hatter NC 1800
302-2 Elizabeth Singleton 38 f 150 SC 1812
302-3 Sarah E Singleton 18 f ga 1832
302-4 Dorcas A Singleton 16 f ga 1834
302-5 Piety E Singleton 14 f ga 1836
302-6 Milton V.B. Singleton 12 m ga 1838
302-7 Nancy L Singleton 10 f ga 1840
302-8 Hannah Singleton 8 f ga 1842
302-9 Peramus Singleton 6 m ga 1844
302-10 Mary A Singleton 4 f ga 1846
302-11 Harriet Singleton 2 f ga 1848
302-12 Levi Singleton 1 m ga 1849