I was looking at Swinnerton's works, when I realized that some of his stuff was syndicated by King Features.
I'm interested in knowing now, does King/Hearst still own the rights to any of Swinnerton's works, as I know they still own the rights to some other early comic strips (or at least the characters) like Betty Boop and Popeye.
I assume Swinnerton's earliest works, late 1800s to the 1920s are public domain, but I saw that King syndicated "Little Jimmy" right around the 40s, so I'm curious if those are in the public domain or not.
Where all do you do your research?