The National Film Preservation Foundation finds what are often the only surviving prints of old movies and restores them so they are not lost to posterity. Not long ago, they did a save on On Strike, a 1920 cartoon short starring Bud Fisher's popular comic strip characters, Mutt and Jeff. 1920 is early enough that Mr. Fisher, who appears in the film in live-action clips, may still actually have been drawing his strip. At some point, he famously passed all the work on to hired hands and would spend his time in leisure activities.
He also did little to no work on the hundreds of short cartoons like this one that were produced by his studio, though sometimes (not this time), the title cards made it sound like he wrote and drew them all by himself. Given Fisher's tendency to feast off the labors of others, the storyline of On Strike sounds like an inside joke by those who actually made it.
You'll have to go over to the N.F.P.N. website to watch On Strike but it's worth the trip. While you're there, you might want to read up on the fine work they do and consider a donation to support it.