From the 1881 Household Cyclopedia

Cut about one-quarter of a pound of fresh bacon into thin slices, soak it on the fire in a stewpan until it is almost done; then put about a quart of peas to it, a good bit of butter, a bunch of parsley, and two spoonfuls of catsup; simmer on a slow fire and reduce the sauce; take out the parsley and serve the rest together.

see Wikipedia Cookbook