Found a really interesting website .. This guy is up in Piercetown, Indiana and has a store catering to re-enactors from the 18th Century, he has a cool collection of videos where he is doing a lot of 18th Century cooking .. Here's one on Peas Porridge ..
https://www.youtube.com/watch?v=A1vR61yNF1U
Really liked some of his ideas of contructing an outdoor bread oven out of clay.