Jack Kirby had been working as a staff artist for Lincoln Features Syndicate for three months, a job he would keep for two years. He created real facts strips (Your Health Comes First and Facts You Never Knew), humorous strips (Socko the Seadog and Abdyl Jones), adventure strips (Black Buccaneer and Cyclone Burke) and editorial cartoons. These strips were done in different styles and signed with different aliases.The enigmatic Lincoln Features, which was run by Horace T. Elmo, is a syndicate that sold features to weekly papers. Elmo never was able to sell a lot of his product. Lincoln was a mix of slapdash and brilliant work. The syndicate's main claim to fame is that Jack Kirby got his start there. Kirby didn't discuss the syndicate in any depth in later years, so we don't know much about it. Some Lincoln material is so rare that it has yet to be found actually appearing in a newspaper (Kirby's Abdul Jones, for instance, so far exists only in the form of a run of proofs that Kirby held onto) - source http://strippersguide.blogspot.com/2011/05/obscurity-of-day-detective-riley.html
Strippersguide.blogspot.com explains that when you DO find a Lincoln strip in a Weekly it usually only runs for only 4-6 episodes which means that the syndicate sent the newspaper some samples, which the Weekly would then use without any intention of picking up the service on a paying basis.
This example of Kirby's early strip work appears in Mark Evanier's KIRBY KING OF COMICS and Greg Theakston's JACK KIRBY TREASURY.