@OurWorkbench I'm a bit stymied, as I don't see how my 1st and 2nd links are connected.
There's so many of the old recipe books that can be downloaded on that site.
Here's where they can be found ...
https://whatcanadaate.lib.uoguelph.ca/exhibits
From that link, here's the 1924 Jello recipe booklet ...
https://whatcanadaate.lib.uoguelph.c...exhibit/item/6
And yes, I have sent myself down the internet rabbit hole on this .... and to think the originals are just a few kms away from moi!