To Put up Herring, According to the Harford Mode

First put the herring into the brine left from curing bacon, or, if you have none of that description, make a brine that will bear an egg, and let them remain in it thirty or forty hours; then, if for pickled herring, change them into new brine, which must also bear an egg, and head them up to keep. If for red herring, hang them up, and smoke them thoroughly. A little saltpetre, added to the brine, is an improvement. It is better to take out the roe.