Here is one about 6 methods of preserving fresh eggs in the 18th century.
The number one method is to put them in slacked lime.
Take note the guy goes to a builders supply to get his lime.
This is the same lime you would use in pickling and making hominy.
One thing he mentions is it isn't the same lime in the garden section, this isn't quite true there are different limes in the garden section.
The slacked lime method had a 100% rate of preservation after I think he said 6 months and reports of 2 years.
Worth
https://youtu.be/yUYgguMz1qI