David Sawley born abt 1853 Wisconsin, father of Samuel Jackson Sawley
Hooray! I think I found Samuel Jackson Sawley born in 1879 with his parents and siblings. He was indexed by Ancestry.com as Samil J. Lawley, although the census image clearly says Sawley.
1880 (taken Jun 12) census, Venango Twp., Erie Co., PA: David Sawley, age 27, farm laborer, born WI, parents born NY; Mary, age 25, wife, born PA, parents born Wales; Aaron, age 3, son, born PA; Samil (sic) J., age 1, son, born PA
1900 census: not found
1910 (taken Apr 10) census, Wilson Twp., Choctaw Co., OK: David B. Sawley, head of household, age 58, divorced, born WI, parents born NY, laborer/odd jobs