Do you think that he could be the James A. King listed in the family of Fargar Ryans or Ryant in the 1860 U.S. Census of Christina Hundred, New Castle County, Delaware? He is listed with a number of apparently brothers and sisters, one of whom is named Smyley (age 7).
1860 U.S Census, Christina Hundred, New Castle County, Delaware, pop, sch. 341B, dwell. 373, fam. 387.
There is a Smiley Wright King, the son of William and Elizabeth King, born on March 7, 1843, and baptized on March 26, 1843, in Wilmington, New Castle County, Delaware in the Delaware, U.S. Baptisms database on www.ancestry.com.