I uploaded an identical copy of a file with a new name. In particular, https://whiteplainshistory.github.io/exhibits/little/LittleFarm.html displays while https://whiteplainshistory.github.io/exhibits/little/LittleFarm2.html gives 404. It’s been over an hour. What’s the deal?
Did you check your email for a page build failure? I had no problems with your pages (as LittleFarm or LittleFarm2) once I fixed my build error.
A more descriptive subject line besides ‘404’ might get you more attention.
I see now, thanks for the pointer!