[blam]

"OK, they know where it came from, but how did it get from the South American Andes to Ireland?"

Infected potatos on board ships?

[Pontiac]

"OK, they know where it came from, but how did it get from the South American Andes to Ireland?"

You are more than likely correct.

Not being aware of any trade between Ireland and South American in the 19th century I can’t say (rubber maybe, bird plumage).

But if there was, potatoes would be a like food stuff put on board for sailors. But I would think that bad potatoes would be chucked over the side.

But if the infected potatoes where disposed of once in port it is possible that they would be picked up by rummaging poor folk and start the infestation.

I suppose we will never know.