Potato Scarcity 1812.

From JHCS 1893

https://durrushistory.wordpress.com/2014/03/11/first-mention-of-potato-west-cork-in-castlehaven-17th-march-1658-costal-trade-in-potatoes-from-baltimore-courtmacsherry-and-onward-export-west-indies-portugal-ending-of-trade-with-coming-of-rail/