This is a blog post by Janet Clarkson who has written several other articles and books on the histories of different delicious items. This article can be found on the blog, The Old Foodie.
This is an article hosted on iFood.tv about the history of potato bread.
Follow this link to view the Online Encyclopedia Article
This is a blog post by Moya Watson on the Potato Farl. This appears to be a personal blog and this article on the potato farl can be found here.