Regarding the John Browning listed with the Albert May Sr family in the 1860 census, I believe he is a nephew through Albert's sister Julia Ann (May) McHenry Browning. In 1851, Julia's 2nd husband Joshua Browning died in Henry County, Illinois. Her son John Browning was born around 1840 in Illinois, so the dates are consistent. Furthermore, another son of Julia and Joshua, William Browning was likely living with another May family in Gonzales County, Texas in 1860, the family of George Harrison Grosvenor May, who I understand to be a son of the Morris May who was a son of Simon Beckham May. Simon May was possibly a brother of Balaam May. Balaam May was Albert and Julia's father.