William Thomas Spradling's grandfather Richard B. Spradling is my 3rd great-grand-uncle.
His family appears in the 1850 census for Fayette Co., IL, just across the county line from Bond Co. IL where his brother James Spradling, my 3ggfth appears with his family. Richard B. and family moved to Grayson Co. TX within the year after the 1850 census.
I am not a paid Ancestry member so can't get your address from them to share more.