A search of Saline County, Illinois, deeds, revealed the following transaction involving James Johnson and that piece of property:
30 January 1866
Jesse E. & Rebecca N. Rude (his wife), of Saline Co., IL
James Johnson of Saline Co., IL
SE 1/4 of SW 1/4 of Section 19 Township 9 South of Range 7 East...
42 30/100 acres
The Illinois Public Domain Land Tract Sales at the Illinois Secretary of State lists some of the transactions for Section 19 Twp 9 South of Range 7 East here.
The county maps (1804-1891) showing Townships and Sections for Illinois are found here; the Saline County map featuring Twp. 9, Section 19 can be found here.