I don't have to point out the hypocrisy in Disney not wanting a robust public domain but one thing I want to point out is that the first Mickey Mouse story Steamboat Willie, the tune Mickey whistles is "Steamboat Bill" by the Leighton Brothers from 1911.
Which in itself is sometimes considered a parody of "The Ballad of Casey Jones" a folk song from the very early 1900s about the train conductor Casey Jones who sacrificed himself to save his passengers in the year 1900 in Memphis, Tennessee.
Fascinating story and an example of embedded mnemonic where art or history is embedded in a thing, sometimes several layers down like this. I didn't know about Casey Jones until digging into the song Mickey Mouse was whistling.
Frankly i dont think its an uncommon thing and is how stories, art and history often gets passed down trough generations, be it intentionally or not. I do however think modern copyright law stands in opposition to this.
Casey Jones was, in fact, a real person and is practically the patron saint of locomotive engineers at this point:
A lot of people think he's a made-up folktale character, but he did actually save every single passenger on his train, including his fireman, Sim Webb, who he told to jump from the cab before the crash. (Sim survived with minor injuries and is one of the best primary sources we have for what actually happened.) The accident happened because the railroads actually came down harder on you for being late than they did for speeding, and the freights his train plowed into were so long that they didn't fit entirely on a siding and were on the main line.
He was only two minutes behind schedule after starting at a 75-minute deficit, and he saved every single passenger on his train to boot. Arguably one of the greatest engineers to ever live.
The song itself is believed to have originated with a friend of Casey's named Wallace Saunders, who was an engine wiper (someone who keeps locomotives clean in the yard). Allegedly it spread from there until an engineer named William Leighton whose brothers were vaudeville performers heard it and passed it along to them. You can read more about the song itself here! It actually gets a bit weird, but the basics are:
- Leighton Brothers perform their Ballad of Casey Jones as part of their act (but don't copyright it)
- After someone finally writes down and copyrights lyrics, Leighton Brothers parody the song they made popular with Steamboat Bill
- Walt Disney makes Steamboat Willie and Buster Keaton stars in Steamboat Bill, Jr. (both in 1928) - Buster's film was six months before Disney's
And now all of this is in the public domain, and we get to use it as we see fit.